./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:57:17,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:57:17,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:57:17,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:57:17,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:57:17,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:57:17,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:57:17,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:57:17,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:57:17,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:57:17,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:57:17,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:57:17,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:57:17,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:57:17,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:57:17,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:57:17,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:57:17,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:57:17,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:57:17,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:57:17,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:57:17,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:57:17,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:57:17,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:57:17,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:57:17,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:57:17,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:57:18,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:57:18,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:57:18,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:57:18,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:57:18,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:57:18,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:57:18,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:57:18,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:57:18,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:57:18,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:57:18,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:57:18,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:57:18,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:57:18,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:57:18,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:57:18,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:57:18,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:57:18,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:57:18,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:57:18,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:57:18,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:57:18,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:57:18,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:57:18,034 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:57:18,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:57:18,035 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:57:18,035 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:57:18,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:57:18,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:57:18,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:57:18,036 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:57:18,036 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:57:18,036 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:57:18,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:57:18,036 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:57:18,037 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:57:18,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:57:18,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:57:18,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:57:18,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:57:18,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:57:18,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:57:18,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:57:18,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:57:18,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:57:18,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:57:18,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2021-12-18 19:57:18,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:57:18,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:57:18,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:57:18,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:57:18,278 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:57:18,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-12-18 19:57:18,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2be29e0ce/df042eb3e1b143fb94704d8a07c8519b/FLAGca485ceb7 [2021-12-18 19:57:18,733 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:57:18,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-12-18 19:57:18,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2be29e0ce/df042eb3e1b143fb94704d8a07c8519b/FLAGca485ceb7 [2021-12-18 19:57:18,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2be29e0ce/df042eb3e1b143fb94704d8a07c8519b [2021-12-18 19:57:18,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:57:18,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:57:18,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:57:18,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:57:18,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:57:18,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:57:18" (1/1) ... [2021-12-18 19:57:18,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642e42fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:18, skipping insertion in model container [2021-12-18 19:57:18,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:57:18" (1/1) ... [2021-12-18 19:57:18,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:57:18,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:57:18,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:57:18,988 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:57:19,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:57:19,034 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:57:19,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19 WrapperNode [2021-12-18 19:57:19,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:57:19,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:57:19,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:57:19,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:57:19,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,074 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2021-12-18 19:57:19,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:57:19,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:57:19,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:57:19,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:57:19,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:57:19,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:57:19,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:57:19,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:57:19,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (1/1) ... [2021-12-18 19:57:19,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:57:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:19,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 19:57:19,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 19:57:19,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:57:19,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:57:19,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:57:19,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:57:19,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:57:19,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:57:19,258 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:57:19,260 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:57:19,407 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:57:19,412 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:57:19,412 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 19:57:19,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:57:19 BoogieIcfgContainer [2021-12-18 19:57:19,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:57:19,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:57:19,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:57:19,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:57:19,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:57:18" (1/3) ... [2021-12-18 19:57:19,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d4c4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:57:19, skipping insertion in model container [2021-12-18 19:57:19,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:57:19" (2/3) ... [2021-12-18 19:57:19,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d4c4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:57:19, skipping insertion in model container [2021-12-18 19:57:19,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:57:19" (3/3) ... [2021-12-18 19:57:19,421 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2021-12-18 19:57:19,426 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:57:19,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-18 19:57:19,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:57:19,458 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 19:57:19,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-18 19:57:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:57:19,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:19,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:19,473 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:19,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-18 19:57:19,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:19,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771557802] [2021-12-18 19:57:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:19,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:19,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:19,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771557802] [2021-12-18 19:57:19,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771557802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:19,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:19,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:57:19,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179153040] [2021-12-18 19:57:19,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:19,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:57:19,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:19,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:57:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:57:19,656 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:19,700 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-18 19:57:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:57:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:57:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:19,707 INFO L225 Difference]: With dead ends: 42 [2021-12-18 19:57:19,708 INFO L226 Difference]: Without dead ends: 40 [2021-12-18 19:57:19,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:57:19,713 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:19,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-18 19:57:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-18 19:57:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-18 19:57:19,746 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 7 [2021-12-18 19:57:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:19,746 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-18 19:57:19,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-18 19:57:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:57:19,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:19,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:19,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:57:19,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-12-18 19:57:19,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:19,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379320047] [2021-12-18 19:57:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:19,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:19,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379320047] [2021-12-18 19:57:19,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379320047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:19,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:19,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:57:19,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987728104] [2021-12-18 19:57:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:19,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:57:19,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:57:19,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:57:19,876 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:19,948 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-18 19:57:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:57:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:57:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:19,949 INFO L225 Difference]: With dead ends: 44 [2021-12-18 19:57:19,949 INFO L226 Difference]: Without dead ends: 44 [2021-12-18 19:57:19,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:57:19,954 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:19,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-18 19:57:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-12-18 19:57:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-18 19:57:19,963 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-18 19:57:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:19,963 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-18 19:57:19,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-18 19:57:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:57:19,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:19,964 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:19,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:57:19,965 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2021-12-18 19:57:19,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:19,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283262527] [2021-12-18 19:57:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:19,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:20,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:20,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283262527] [2021-12-18 19:57:20,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283262527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765115178] [2021-12-18 19:57:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:20,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:20,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:20,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:57:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:20,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:57:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:20,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:57:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765115178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:20,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:57:20,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-18 19:57:20,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729856787] [2021-12-18 19:57:20,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:20,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:57:20,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:57:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:57:20,167 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:20,189 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2021-12-18 19:57:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:57:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 19:57:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:20,190 INFO L225 Difference]: With dead ends: 79 [2021-12-18 19:57:20,190 INFO L226 Difference]: Without dead ends: 79 [2021-12-18 19:57:20,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:57:20,191 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 107 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:20,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 80 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-18 19:57:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2021-12-18 19:57:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-18 19:57:20,195 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2021-12-18 19:57:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:20,195 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-18 19:57:20,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-18 19:57:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:57:20,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:20,195 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:20,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:20,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:20,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-18 19:57:20,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:20,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999444224] [2021-12-18 19:57:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:20,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:20,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:20,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999444224] [2021-12-18 19:57:20,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999444224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:20,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242971516] [2021-12-18 19:57:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:20,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:20,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:20,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:20,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:57:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:57:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:57:20,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:57:20,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:57:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:20,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:20,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242971516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:20,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:20,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-18 19:57:20,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212854561] [2021-12-18 19:57:20,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:20,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:57:20,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:57:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:57:20,843 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:20,909 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-18 19:57:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:57:20,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 19:57:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:20,910 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:57:20,910 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:57:20,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:57:20,911 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 79 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:20,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:57:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-12-18 19:57:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-18 19:57:20,914 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 11 [2021-12-18 19:57:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:20,914 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-18 19:57:20,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-18 19:57:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:57:20,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:20,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:20,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-18 19:57:21,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-18 19:57:21,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2021-12-18 19:57:21,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584426636] [2021-12-18 19:57:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:21,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:21,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:21,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584426636] [2021-12-18 19:57:21,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584426636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:21,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:21,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:57:21,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528414580] [2021-12-18 19:57:21,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:21,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:57:21,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:21,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:57:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:57:21,170 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:21,184 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-12-18 19:57:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:57:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:57:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:21,185 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:57:21,185 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:57:21,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:57:21,186 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:21,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:57:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-12-18 19:57:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-18 19:57:21,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2021-12-18 19:57:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:21,189 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-18 19:57:21,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-18 19:57:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:57:21,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:21,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:21,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:57:21,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2021-12-18 19:57:21,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:21,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981516049] [2021-12-18 19:57:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:21,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:21,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981516049] [2021-12-18 19:57:21,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981516049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:21,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:21,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:57:21,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623657794] [2021-12-18 19:57:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:21,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:57:21,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:57:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:57:21,209 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:21,220 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-18 19:57:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:57:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:57:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:21,221 INFO L225 Difference]: With dead ends: 46 [2021-12-18 19:57:21,221 INFO L226 Difference]: Without dead ends: 46 [2021-12-18 19:57:21,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:57:21,222 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:21,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-18 19:57:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-18 19:57:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.394736842105263) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-18 19:57:21,225 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-18 19:57:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:21,225 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-18 19:57:21,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-18 19:57:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:57:21,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:21,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:21,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:57:21,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2021-12-18 19:57:21,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:21,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126016928] [2021-12-18 19:57:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:21,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:21,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:21,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126016928] [2021-12-18 19:57:21,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126016928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:21,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:21,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:57:21,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951182119] [2021-12-18 19:57:21,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:21,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:57:21,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:57:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:57:21,280 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:21,304 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-12-18 19:57:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:57:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:57:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:21,305 INFO L225 Difference]: With dead ends: 48 [2021-12-18 19:57:21,305 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 19:57:21,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:57:21,306 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:21,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 19:57:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-18 19:57:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.358974358974359) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-18 19:57:21,308 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-18 19:57:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:21,308 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-18 19:57:21,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-18 19:57:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:57:21,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:21,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:21,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:57:21,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:21,309 INFO L85 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2021-12-18 19:57:21,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:21,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182822555] [2021-12-18 19:57:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:21,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:21,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182822555] [2021-12-18 19:57:21,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182822555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766698688] [2021-12-18 19:57:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:21,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:21,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:21,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:57:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:21,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:57:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:21,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:21,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-18 19:57:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766698688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:21,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:21,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-18 19:57:21,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059604416] [2021-12-18 19:57:21,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:21,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:57:21,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:21,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:57:21,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:57:21,651 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:21,748 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-12-18 19:57:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:57:21,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:57:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:21,749 INFO L225 Difference]: With dead ends: 74 [2021-12-18 19:57:21,749 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 19:57:21,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:57:21,749 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 170 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:21,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 153 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:57:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 19:57:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2021-12-18 19:57:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-18 19:57:21,752 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 17 [2021-12-18 19:57:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:21,752 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-18 19:57:21,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-18 19:57:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:57:21,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:21,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:21,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:21,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:21,960 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2021-12-18 19:57:21,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:21,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764266455] [2021-12-18 19:57:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:21,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:21,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:21,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764266455] [2021-12-18 19:57:21,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764266455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117629258] [2021-12-18 19:57:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:21,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:21,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:21,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:21,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:57:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:57:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:22,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:57:22,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117629258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:22,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:57:22,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-18 19:57:22,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042341409] [2021-12-18 19:57:22,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:22,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:57:22,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:22,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:57:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:57:22,082 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:22,097 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-18 19:57:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:57:22,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:57:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:22,098 INFO L225 Difference]: With dead ends: 100 [2021-12-18 19:57:22,098 INFO L226 Difference]: Without dead ends: 100 [2021-12-18 19:57:22,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:57:22,098 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:22,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 103 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-18 19:57:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2021-12-18 19:57:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-12-18 19:57:22,102 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 17 [2021-12-18 19:57:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:22,102 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-12-18 19:57:22,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-12-18 19:57:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:57:22,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:22,103 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:22,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:22,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:22,319 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2021-12-18 19:57:22,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959137054] [2021-12-18 19:57:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:22,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:22,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:22,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959137054] [2021-12-18 19:57:22,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959137054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:22,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045027377] [2021-12-18 19:57:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:22,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:22,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:22,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:22,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:57:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:57:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:22,444 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:57:22,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:57:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:22,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:22,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045027377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:22,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:22,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-18 19:57:22,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091775957] [2021-12-18 19:57:22,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:22,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:57:22,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:57:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:57:22,670 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:22,739 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-12-18 19:57:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:57:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:57:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:22,740 INFO L225 Difference]: With dead ends: 81 [2021-12-18 19:57:22,740 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 19:57:22,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:57:22,741 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 89 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:22,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 101 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 19:57:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-12-18 19:57:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-12-18 19:57:22,744 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 17 [2021-12-18 19:57:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:22,744 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-12-18 19:57:22,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-12-18 19:57:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:57:22,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:22,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:22,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:22,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 19:57:22,959 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2021-12-18 19:57:22,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:22,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430638810] [2021-12-18 19:57:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:22,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:23,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:23,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430638810] [2021-12-18 19:57:23,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430638810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:23,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:23,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:57:23,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181171898] [2021-12-18 19:57:23,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:23,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:57:23,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:57:23,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:57:23,031 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:23,074 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-12-18 19:57:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:57:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:57:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:23,075 INFO L225 Difference]: With dead ends: 74 [2021-12-18 19:57:23,075 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 19:57:23,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:57:23,077 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:23,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 54 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 19:57:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-12-18 19:57:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-12-18 19:57:23,079 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 17 [2021-12-18 19:57:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:23,079 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-12-18 19:57:23,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-12-18 19:57:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:57:23,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:23,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:23,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:57:23,080 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484247, now seen corresponding path program 1 times [2021-12-18 19:57:23,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080300366] [2021-12-18 19:57:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:23,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:23,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080300366] [2021-12-18 19:57:23,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080300366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:23,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:23,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:57:23,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318796647] [2021-12-18 19:57:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:23,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:57:23,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:23,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:57:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:57:23,107 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:23,133 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-18 19:57:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:57:23,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:57:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:23,133 INFO L225 Difference]: With dead ends: 60 [2021-12-18 19:57:23,133 INFO L226 Difference]: Without dead ends: 60 [2021-12-18 19:57:23,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:57:23,134 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:23,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 64 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-18 19:57:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-18 19:57:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-18 19:57:23,136 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 21 [2021-12-18 19:57:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:23,136 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-18 19:57:23,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-18 19:57:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:57:23,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:23,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:23,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 19:57:23,137 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:23,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484246, now seen corresponding path program 1 times [2021-12-18 19:57:23,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:23,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279342012] [2021-12-18 19:57:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:23,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:23,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279342012] [2021-12-18 19:57:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279342012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349435905] [2021-12-18 19:57:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:23,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:23,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:23,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:57:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:57:23,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:23,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:23,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-18 19:57:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:23,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349435905] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:23,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:23,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-12-18 19:57:23,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606740550] [2021-12-18 19:57:23,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:23,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:57:23,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:23,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:57:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:57:23,428 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:23,519 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-12-18 19:57:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:57:23,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:57:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:23,520 INFO L225 Difference]: With dead ends: 70 [2021-12-18 19:57:23,520 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 19:57:23,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:57:23,520 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:23,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 112 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 19:57:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-12-18 19:57:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-12-18 19:57:23,522 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 21 [2021-12-18 19:57:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:23,522 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-12-18 19:57:23,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-12-18 19:57:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:57:23,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:23,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:23,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:23,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:23,740 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash -618546161, now seen corresponding path program 1 times [2021-12-18 19:57:23,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:23,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002081752] [2021-12-18 19:57:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:23,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:23,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:23,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002081752] [2021-12-18 19:57:23,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002081752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:23,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:23,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:57:23,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306874773] [2021-12-18 19:57:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:23,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:57:23,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:57:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:57:23,790 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:23,829 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-12-18 19:57:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:57:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:57:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:23,830 INFO L225 Difference]: With dead ends: 65 [2021-12-18 19:57:23,830 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 19:57:23,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:57:23,831 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:23,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 89 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 19:57:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2021-12-18 19:57:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-12-18 19:57:23,841 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 25 [2021-12-18 19:57:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:23,841 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-12-18 19:57:23,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-12-18 19:57:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:57:23,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:23,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:23,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 19:57:23,844 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash -618546160, now seen corresponding path program 1 times [2021-12-18 19:57:23,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:23,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901472446] [2021-12-18 19:57:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:23,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:57:23,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901472446] [2021-12-18 19:57:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901472446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:23,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:23,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:57:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530847743] [2021-12-18 19:57:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:23,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:57:23,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:57:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:57:23,912 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:23,969 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-12-18 19:57:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:57:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:57:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:23,970 INFO L225 Difference]: With dead ends: 65 [2021-12-18 19:57:23,970 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 19:57:23,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:57:23,973 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:23,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 91 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 19:57:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-12-18 19:57:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-12-18 19:57:23,975 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 25 [2021-12-18 19:57:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:23,975 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-12-18 19:57:23,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-12-18 19:57:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:57:23,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:23,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:23,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 19:57:23,982 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1995099464, now seen corresponding path program 1 times [2021-12-18 19:57:23,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818063497] [2021-12-18 19:57:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:23,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:57:24,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:24,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818063497] [2021-12-18 19:57:24,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818063497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:24,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:24,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:57:24,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990991472] [2021-12-18 19:57:24,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:24,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:57:24,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:57:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:57:24,043 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:24,054 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-12-18 19:57:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:57:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-18 19:57:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:24,055 INFO L225 Difference]: With dead ends: 62 [2021-12-18 19:57:24,055 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 19:57:24,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:57:24,056 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:24,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 19:57:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-18 19:57:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-12-18 19:57:24,057 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 26 [2021-12-18 19:57:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:24,057 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-12-18 19:57:24,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-12-18 19:57:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:57:24,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:24,058 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:24,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 19:57:24,058 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1127339532, now seen corresponding path program 1 times [2021-12-18 19:57:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:24,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040814286] [2021-12-18 19:57:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:24,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:24,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040814286] [2021-12-18 19:57:24,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040814286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775366101] [2021-12-18 19:57:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:24,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:24,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:24,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:24,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:57:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 19:57:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:24,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:57:24,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:57:24,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 19:57:24,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:57:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:57:24,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:57:24,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775366101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:24,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:57:24,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 13 [2021-12-18 19:57:24,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550992780] [2021-12-18 19:57:24,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:24,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:57:24,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:57:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:57:24,374 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:24,471 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-12-18 19:57:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:57:24,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 19:57:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:24,472 INFO L225 Difference]: With dead ends: 78 [2021-12-18 19:57:24,472 INFO L226 Difference]: Without dead ends: 46 [2021-12-18 19:57:24,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:57:24,472 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:24,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:57:24,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-18 19:57:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-18 19:57:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-18 19:57:24,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2021-12-18 19:57:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:24,474 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-18 19:57:24,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-18 19:57:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:57:24,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:24,474 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:24,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:24,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:24,689 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash 795888502, now seen corresponding path program 1 times [2021-12-18 19:57:24,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989986115] [2021-12-18 19:57:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:24,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:24,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:24,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989986115] [2021-12-18 19:57:24,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989986115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:24,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440772263] [2021-12-18 19:57:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:24,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:24,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:24,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:24,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:57:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:24,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 19:57:24,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:25,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:25,101 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-18 19:57:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-18 19:57:25,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:25,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:25,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-18 19:57:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:25,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:26,785 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) is different from false [2021-12-18 19:57:26,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-12-18 19:57:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:26,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440772263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:26,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:26,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2021-12-18 19:57:26,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136586768] [2021-12-18 19:57:26,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:26,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:57:26,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:57:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=427, Unknown=1, NotChecked=42, Total=552 [2021-12-18 19:57:26,891 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:29,080 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~length1~0#1| (- 1))) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~length1~0#1|) (= 1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (<= |c_ULTIMATE.start_main_~i~0#1| 1) (<= |c_ULTIMATE.start_main_~length1~0#1| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (= 0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) (= |c_ULTIMATE.start_main_~length2~0#1| 1)) is different from false [2021-12-18 19:57:30,123 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= 1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) is different from false [2021-12-18 19:57:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:30,181 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-12-18 19:57:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:57:30,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 19:57:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:30,182 INFO L225 Difference]: With dead ends: 99 [2021-12-18 19:57:30,182 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 19:57:30,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=154, Invalid=725, Unknown=3, NotChecked=174, Total=1056 [2021-12-18 19:57:30,183 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:30,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 263 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 192 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-12-18 19:57:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 19:57:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-12-18 19:57:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-12-18 19:57:30,185 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 29 [2021-12-18 19:57:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:30,185 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-12-18 19:57:30,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-12-18 19:57:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 19:57:30,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:30,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:30,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:30,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 19:57:30,386 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:30,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1769750649, now seen corresponding path program 2 times [2021-12-18 19:57:30,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:30,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312234641] [2021-12-18 19:57:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:30,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:30,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312234641] [2021-12-18 19:57:30,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312234641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005477229] [2021-12-18 19:57:30,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:57:30,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:30,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:57:30,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:57:30,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 19:57:30,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:30,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:57:30,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:57:30,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:57:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:30,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:31,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005477229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:31,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:31,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2021-12-18 19:57:31,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305192849] [2021-12-18 19:57:31,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:31,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 19:57:31,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:31,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 19:57:31,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:57:31,038 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:31,305 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-18 19:57:31,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:57:31,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-18 19:57:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:31,306 INFO L225 Difference]: With dead ends: 68 [2021-12-18 19:57:31,306 INFO L226 Difference]: Without dead ends: 68 [2021-12-18 19:57:31,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:57:31,307 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 184 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:31,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 147 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:57:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-18 19:57:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-12-18 19:57:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-12-18 19:57:31,308 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2021-12-18 19:57:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:31,309 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-12-18 19:57:31,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-12-18 19:57:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:57:31,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:31,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:31,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-18 19:57:31,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:31,519 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -972218812, now seen corresponding path program 1 times [2021-12-18 19:57:31,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:31,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634438391] [2021-12-18 19:57:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:31,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 19:57:31,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:31,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634438391] [2021-12-18 19:57:31,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634438391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:57:31,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:57:31,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 19:57:31,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720792361] [2021-12-18 19:57:31,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:57:31,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:57:31,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:57:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:57:31,622 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:31,787 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-12-18 19:57:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:57:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 19:57:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:31,788 INFO L225 Difference]: With dead ends: 88 [2021-12-18 19:57:31,788 INFO L226 Difference]: Without dead ends: 88 [2021-12-18 19:57:31,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-12-18 19:57:31,789 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:31,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 183 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:57:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-18 19:57:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-12-18 19:57:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.119047619047619) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-12-18 19:57:31,791 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 34 [2021-12-18 19:57:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:31,791 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-12-18 19:57:31,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-12-18 19:57:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:57:31,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:31,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:31,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 19:57:31,791 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash -270618938, now seen corresponding path program 1 times [2021-12-18 19:57:31,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:31,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434662286] [2021-12-18 19:57:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:31,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:31,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434662286] [2021-12-18 19:57:31,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434662286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044822327] [2021-12-18 19:57:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:31,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:31,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:31,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:31,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:57:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 19:57:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:32,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:32,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:57:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:32,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:57:32,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:57:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:32,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044822327] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:32,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:32,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2021-12-18 19:57:32,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710065098] [2021-12-18 19:57:32,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:32,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:57:32,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:57:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:57:32,250 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:32,549 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-12-18 19:57:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:57:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 19:57:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:32,550 INFO L225 Difference]: With dead ends: 116 [2021-12-18 19:57:32,550 INFO L226 Difference]: Without dead ends: 116 [2021-12-18 19:57:32,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:57:32,552 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 154 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:32,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 245 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:57:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-18 19:57:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 90. [2021-12-18 19:57:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-12-18 19:57:32,554 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 34 [2021-12-18 19:57:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:32,554 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-12-18 19:57:32,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-12-18 19:57:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 19:57:32,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:32,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:32,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:32,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-18 19:57:32,767 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1855891613, now seen corresponding path program 2 times [2021-12-18 19:57:32,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:32,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522215308] [2021-12-18 19:57:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:32,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:32,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522215308] [2021-12-18 19:57:32,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522215308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547918667] [2021-12-18 19:57:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:57:32,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:32,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:57:32,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:57:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:57:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:33,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:33,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:57:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:33,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547918667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:33,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:33,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2021-12-18 19:57:33,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829822047] [2021-12-18 19:57:33,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:33,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:57:33,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:57:33,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:57:33,245 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:33,549 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2021-12-18 19:57:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:57:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-18 19:57:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:33,550 INFO L225 Difference]: With dead ends: 112 [2021-12-18 19:57:33,550 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 19:57:33,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:57:33,551 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 171 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:33,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 335 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:57:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 19:57:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-12-18 19:57:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2021-12-18 19:57:33,553 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 38 [2021-12-18 19:57:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:33,553 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2021-12-18 19:57:33,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2021-12-18 19:57:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:57:33,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:33,554 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:33,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:33,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-18 19:57:33,763 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash 759394243, now seen corresponding path program 3 times [2021-12-18 19:57:33,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:33,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969347438] [2021-12-18 19:57:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:33,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:34,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969347438] [2021-12-18 19:57:34,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969347438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887417752] [2021-12-18 19:57:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:57:34,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:34,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:34,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:34,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:57:34,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:57:34,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:34,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:57:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:34,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:57:34,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:57:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:34,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:34,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-18 19:57:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:34,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:34,819 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_416 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_416) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-18 19:57:34,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:34,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:57:34,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:57:34,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:57:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:35,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887417752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:35,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 14] total 40 [2021-12-18 19:57:35,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231922297] [2021-12-18 19:57:35,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:35,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 19:57:35,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 19:57:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1343, Unknown=1, NotChecked=74, Total=1560 [2021-12-18 19:57:35,037 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:35,479 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2021-12-18 19:57:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:57:35,479 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-18 19:57:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:35,480 INFO L225 Difference]: With dead ends: 175 [2021-12-18 19:57:35,480 INFO L226 Difference]: Without dead ends: 146 [2021-12-18 19:57:35,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=2376, Unknown=1, NotChecked=100, Total=2756 [2021-12-18 19:57:35,481 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 236 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:35,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 391 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 349 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2021-12-18 19:57:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-18 19:57:35,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2021-12-18 19:57:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 136 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-12-18 19:57:35,483 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 41 [2021-12-18 19:57:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:35,484 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-12-18 19:57:35,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-12-18 19:57:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 19:57:35,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:35,484 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:35,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-18 19:57:35,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-18 19:57:35,703 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1122231478, now seen corresponding path program 3 times [2021-12-18 19:57:35,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721806510] [2021-12-18 19:57:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:35,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:35,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:35,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721806510] [2021-12-18 19:57:35,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721806510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:35,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426875299] [2021-12-18 19:57:35,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:57:35,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:35,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:35,903 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:35,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:57:35,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:57:35,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 19:57:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:36,013 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:57:36,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:57:36,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:57:36,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:36,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-18 19:57:37,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:37,163 INFO L354 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2021-12-18 19:57:37,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-12-18 19:57:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:37,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:37,410 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-18 19:57:37,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 76 [2021-12-18 19:57:37,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-12-18 19:57:37,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:57:37,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:37,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 61 [2021-12-18 19:57:38,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:38,343 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-18 19:57:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:38,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426875299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:38,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:38,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 22] total 53 [2021-12-18 19:57:38,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510176355] [2021-12-18 19:57:38,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:38,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 19:57:38,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 19:57:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2465, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 19:57:38,348 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:40,580 INFO L93 Difference]: Finished difference Result 214 states and 233 transitions. [2021-12-18 19:57:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:57:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-18 19:57:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:40,581 INFO L225 Difference]: With dead ends: 214 [2021-12-18 19:57:40,581 INFO L226 Difference]: Without dead ends: 198 [2021-12-18 19:57:40,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=993, Invalid=7749, Unknown=0, NotChecked=0, Total=8742 [2021-12-18 19:57:40,583 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 385 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:40,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 460 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 501 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2021-12-18 19:57:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-18 19:57:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 161. [2021-12-18 19:57:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 159 states have (on average 1.1132075471698113) internal successors, (177), 160 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2021-12-18 19:57:40,586 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 43 [2021-12-18 19:57:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:40,586 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2021-12-18 19:57:40,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2021-12-18 19:57:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 19:57:40,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:40,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:40,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:40,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-18 19:57:40,804 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash -544147386, now seen corresponding path program 4 times [2021-12-18 19:57:40,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213739624] [2021-12-18 19:57:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:40,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:40,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:40,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213739624] [2021-12-18 19:57:40,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213739624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:40,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463443018] [2021-12-18 19:57:40,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:57:40,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:40,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:40,908 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:40,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:57:40,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:57:40,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:40,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:57:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:41,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:41,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:57:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:41,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463443018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:41,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:41,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-18 19:57:41,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558478324] [2021-12-18 19:57:41,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:41,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 19:57:41,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 19:57:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:57:41,327 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:41,598 INFO L93 Difference]: Finished difference Result 194 states and 210 transitions. [2021-12-18 19:57:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:57:41,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-18 19:57:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:41,600 INFO L225 Difference]: With dead ends: 194 [2021-12-18 19:57:41,600 INFO L226 Difference]: Without dead ends: 194 [2021-12-18 19:57:41,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:57:41,601 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 195 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:41,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 409 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:57:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-18 19:57:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-12-18 19:57:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.1147540983606556) internal successors, (204), 184 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 204 transitions. [2021-12-18 19:57:41,605 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 204 transitions. Word has length 45 [2021-12-18 19:57:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:41,605 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 204 transitions. [2021-12-18 19:57:41,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 204 transitions. [2021-12-18 19:57:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 19:57:41,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:41,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:41,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:41,807 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 921214137, now seen corresponding path program 4 times [2021-12-18 19:57:41,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144583363] [2021-12-18 19:57:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:41,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144583363] [2021-12-18 19:57:41,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144583363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410113074] [2021-12-18 19:57:41,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:57:41,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:41,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:41,954 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:41,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:57:42,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:57:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:57:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:42,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:42,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:57:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:57:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410113074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:42,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:42,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2021-12-18 19:57:42,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553560610] [2021-12-18 19:57:42,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:42,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 19:57:42,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 19:57:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:57:42,418 INFO L87 Difference]: Start difference. First operand 185 states and 204 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:42,775 INFO L93 Difference]: Finished difference Result 272 states and 301 transitions. [2021-12-18 19:57:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:57:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-18 19:57:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:42,776 INFO L225 Difference]: With dead ends: 272 [2021-12-18 19:57:42,776 INFO L226 Difference]: Without dead ends: 272 [2021-12-18 19:57:42,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 19:57:42,777 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 227 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:42,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 392 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:57:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-18 19:57:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 239. [2021-12-18 19:57:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.130801687763713) internal successors, (268), 238 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 268 transitions. [2021-12-18 19:57:42,782 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 268 transitions. Word has length 47 [2021-12-18 19:57:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:42,782 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 268 transitions. [2021-12-18 19:57:42,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 268 transitions. [2021-12-18 19:57:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:57:42,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:42,783 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:42,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:42,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 19:57:42,995 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1256228128, now seen corresponding path program 5 times [2021-12-18 19:57:42,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:42,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233754004] [2021-12-18 19:57:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:42,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:43,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233754004] [2021-12-18 19:57:43,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233754004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749847001] [2021-12-18 19:57:43,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:57:43,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:43,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:43,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:43,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:57:43,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 19:57:43,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 19:57:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:43,595 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:57:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:57:43,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:57:43,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:43,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 19:57:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 19:57:44,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:44,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:57:44,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:57:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 19:57:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749847001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:44,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:44,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 47 [2021-12-18 19:57:44,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202363904] [2021-12-18 19:57:44,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:44,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:57:44,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:57:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2014, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:57:44,968 INFO L87 Difference]: Start difference. First operand 239 states and 268 transitions. Second operand has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:49,696 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2021-12-18 19:57:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 19:57:49,696 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-18 19:57:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:49,697 INFO L225 Difference]: With dead ends: 289 [2021-12-18 19:57:49,697 INFO L226 Difference]: Without dead ends: 221 [2021-12-18 19:57:49,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1852, Invalid=10580, Unknown=0, NotChecked=0, Total=12432 [2021-12-18 19:57:49,700 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 330 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:49,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 815 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1574 Invalid, 0 Unknown, 197 Unchecked, 0.7s Time] [2021-12-18 19:57:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-18 19:57:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 189. [2021-12-18 19:57:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.1336898395721926) internal successors, (212), 188 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2021-12-18 19:57:49,703 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 52 [2021-12-18 19:57:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:49,703 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2021-12-18 19:57:49,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2021-12-18 19:57:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 19:57:49,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:49,704 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:49,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:49,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 19:57:49,919 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -176289136, now seen corresponding path program 5 times [2021-12-18 19:57:49,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:49,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406222726] [2021-12-18 19:57:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:49,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:50,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406222726] [2021-12-18 19:57:50,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406222726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065301306] [2021-12-18 19:57:50,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:57:50,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:50,120 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:50,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:57:50,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 19:57:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:57:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:50,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:57:50,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:50,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:57:50,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:57:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:50,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:50,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_610 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_610) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-18 19:57:50,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:50,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:57:50,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:50,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:57:50,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:57:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:50,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065301306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:50,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:50,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2021-12-18 19:57:50,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477863171] [2021-12-18 19:57:50,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 19:57:50,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 19:57:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=726, Unknown=1, NotChecked=54, Total=870 [2021-12-18 19:57:50,822 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:51,235 INFO L93 Difference]: Finished difference Result 320 states and 353 transitions. [2021-12-18 19:57:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:57:51,239 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-18 19:57:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:51,240 INFO L225 Difference]: With dead ends: 320 [2021-12-18 19:57:51,240 INFO L226 Difference]: Without dead ends: 283 [2021-12-18 19:57:51,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=1603, Unknown=1, NotChecked=82, Total=1892 [2021-12-18 19:57:51,241 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 107 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:51,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 583 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 462 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2021-12-18 19:57:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-18 19:57:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 264. [2021-12-18 19:57:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 262 states have (on average 1.118320610687023) internal successors, (293), 263 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 293 transitions. [2021-12-18 19:57:51,245 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 293 transitions. Word has length 53 [2021-12-18 19:57:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:51,246 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 293 transitions. [2021-12-18 19:57:51,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 293 transitions. [2021-12-18 19:57:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 19:57:51,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:51,247 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:51,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:51,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 19:57:51,459 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1235096899, now seen corresponding path program 1 times [2021-12-18 19:57:51,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:51,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947273272] [2021-12-18 19:57:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:51,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 19:57:51,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947273272] [2021-12-18 19:57:51,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947273272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481743427] [2021-12-18 19:57:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:51,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:51,520 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:51,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:57:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:51,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:57:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:51,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:52,019 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-18 19:57:52,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 14 [2021-12-18 19:57:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 19:57:52,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:52,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-18 19:57:52,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-18 19:57:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-12-18 19:57:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 19:57:52,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481743427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:52,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:52,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 35 [2021-12-18 19:57:52,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197267771] [2021-12-18 19:57:52,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:52,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:57:52,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:57:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:57:52,374 INFO L87 Difference]: Start difference. First operand 264 states and 293 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:53,633 INFO L93 Difference]: Finished difference Result 361 states and 390 transitions. [2021-12-18 19:57:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-18 19:57:53,633 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-18 19:57:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:53,634 INFO L225 Difference]: With dead ends: 361 [2021-12-18 19:57:53,634 INFO L226 Difference]: Without dead ends: 345 [2021-12-18 19:57:53,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=664, Invalid=4738, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:57:53,635 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 166 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:53,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 714 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 628 Invalid, 0 Unknown, 331 Unchecked, 0.3s Time] [2021-12-18 19:57:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-18 19:57:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 272. [2021-12-18 19:57:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 270 states have (on average 1.114814814814815) internal successors, (301), 271 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2021-12-18 19:57:53,639 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 55 [2021-12-18 19:57:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:53,640 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2021-12-18 19:57:53,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2021-12-18 19:57:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 19:57:53,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:53,640 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:53,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:53,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 19:57:53,851 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1154213523, now seen corresponding path program 6 times [2021-12-18 19:57:53,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:53,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267722240] [2021-12-18 19:57:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:53,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:53,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:53,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267722240] [2021-12-18 19:57:53,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267722240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:53,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839758248] [2021-12-18 19:57:53,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:57:53,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:53,976 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:53,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:57:54,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 19:57:54,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:57:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:54,091 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:57:54,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:57:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:54,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:54,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839758248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:54,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:54,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2021-12-18 19:57:54,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150357910] [2021-12-18 19:57:54,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:54,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 19:57:54,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 19:57:54,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:57:54,717 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 29 states, 28 states have (on average 4.964285714285714) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:55,011 INFO L93 Difference]: Finished difference Result 328 states and 361 transitions. [2021-12-18 19:57:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:57:55,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.964285714285714) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-18 19:57:55,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:55,012 INFO L225 Difference]: With dead ends: 328 [2021-12-18 19:57:55,012 INFO L226 Difference]: Without dead ends: 328 [2021-12-18 19:57:55,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=1198, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:57:55,013 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 132 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:55,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 500 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:57:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-18 19:57:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 317. [2021-12-18 19:57:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 315 states have (on average 1.1206349206349207) internal successors, (353), 316 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 353 transitions. [2021-12-18 19:57:55,018 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 353 transitions. Word has length 57 [2021-12-18 19:57:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 353 transitions. [2021-12-18 19:57:55,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.964285714285714) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 353 transitions. [2021-12-18 19:57:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 19:57:55,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:55,021 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:55,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:55,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:55,227 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:57:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1450362154, now seen corresponding path program 2 times [2021-12-18 19:57:55,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253102467] [2021-12-18 19:57:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:55,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 19:57:55,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:55,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253102467] [2021-12-18 19:57:55,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253102467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:55,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034708506] [2021-12-18 19:57:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:57:55,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:55,397 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:55,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:57:55,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:57:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:55,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:57:55,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:56,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:56,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-18 19:57:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:57:56,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:56,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:57:56,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:57:56,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:57:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:57:56,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034708506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:56,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:56,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2021-12-18 19:57:56,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060199034] [2021-12-18 19:57:56,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:56,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 19:57:56,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 19:57:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:57:56,848 INFO L87 Difference]: Start difference. First operand 317 states and 353 transitions. Second operand has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:01,909 INFO L93 Difference]: Finished difference Result 439 states and 474 transitions. [2021-12-18 19:58:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 19:58:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-18 19:58:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:01,910 INFO L225 Difference]: With dead ends: 439 [2021-12-18 19:58:01,910 INFO L226 Difference]: Without dead ends: 397 [2021-12-18 19:58:01,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=624, Invalid=5381, Unknown=1, NotChecked=0, Total=6006 [2021-12-18 19:58:01,912 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:01,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 647 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 266 Unchecked, 0.1s Time] [2021-12-18 19:58:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-18 19:58:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 298. [2021-12-18 19:58:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 296 states have (on average 1.1081081081081081) internal successors, (328), 297 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 328 transitions. [2021-12-18 19:58:01,916 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 328 transitions. Word has length 60 [2021-12-18 19:58:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:01,916 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 328 transitions. [2021-12-18 19:58:01,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 328 transitions. [2021-12-18 19:58:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:58:01,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:01,917 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:01,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:02,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-18 19:58:02,134 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1199547427, now seen corresponding path program 7 times [2021-12-18 19:58:02,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:02,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579110963] [2021-12-18 19:58:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:02,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:02,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579110963] [2021-12-18 19:58:02,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579110963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883184038] [2021-12-18 19:58:02,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:58:02,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:02,359 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:02,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:58:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 19:58:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:02,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:02,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:58:02,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-18 19:58:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:58:03,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:58:03,415 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 19:58:03,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2021-12-18 19:58:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:03,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:03,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-18 19:58:03,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:58:03,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-18 19:58:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:04,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883184038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:04,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:04,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 48 [2021-12-18 19:58:04,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081324165] [2021-12-18 19:58:04,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:04,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 19:58:04,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 19:58:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:58:04,038 INFO L87 Difference]: Start difference. First operand 298 states and 328 transitions. Second operand has 48 states, 48 states have (on average 3.125) internal successors, (150), 48 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:04,891 INFO L93 Difference]: Finished difference Result 510 states and 554 transitions. [2021-12-18 19:58:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:58:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.125) internal successors, (150), 48 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-18 19:58:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:04,893 INFO L225 Difference]: With dead ends: 510 [2021-12-18 19:58:04,893 INFO L226 Difference]: Without dead ends: 394 [2021-12-18 19:58:04,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:58:04,894 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:04,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1125 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 710 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2021-12-18 19:58:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-18 19:58:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 362. [2021-12-18 19:58:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.1055555555555556) internal successors, (398), 361 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 398 transitions. [2021-12-18 19:58:04,898 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 398 transitions. Word has length 65 [2021-12-18 19:58:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:04,899 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 398 transitions. [2021-12-18 19:58:04,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.125) internal successors, (150), 48 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 398 transitions. [2021-12-18 19:58:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 19:58:04,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:04,900 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:04,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:05,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:05,115 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash -512930976, now seen corresponding path program 8 times [2021-12-18 19:58:05,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:05,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060979679] [2021-12-18 19:58:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:05,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:05,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:05,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060979679] [2021-12-18 19:58:05,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060979679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:05,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023796513] [2021-12-18 19:58:05,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:58:05,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:05,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:05,273 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:05,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:58:05,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:58:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:05,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 19:58:05,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:58:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:58:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:05,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:06,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023796513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:06,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:06,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2021-12-18 19:58:06,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205356032] [2021-12-18 19:58:06,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:06,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 19:58:06,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 19:58:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:58:06,413 INFO L87 Difference]: Start difference. First operand 362 states and 398 transitions. Second operand has 41 states, 40 states have (on average 4.975) internal successors, (199), 41 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:07,205 INFO L93 Difference]: Finished difference Result 436 states and 473 transitions. [2021-12-18 19:58:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 19:58:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.975) internal successors, (199), 41 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-18 19:58:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:07,207 INFO L225 Difference]: With dead ends: 436 [2021-12-18 19:58:07,207 INFO L226 Difference]: Without dead ends: 436 [2021-12-18 19:58:07,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=677, Invalid=2983, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:58:07,208 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 387 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:07,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 829 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:58:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-12-18 19:58:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2021-12-18 19:58:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 402 states have (on average 1.1069651741293531) internal successors, (445), 403 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 445 transitions. [2021-12-18 19:58:07,213 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 445 transitions. Word has length 69 [2021-12-18 19:58:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:07,213 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 445 transitions. [2021-12-18 19:58:07,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.975) internal successors, (199), 41 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 445 transitions. [2021-12-18 19:58:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-18 19:58:07,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:07,214 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:07,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:07,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:07,429 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2096231571, now seen corresponding path program 3 times [2021-12-18 19:58:07,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:07,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567445869] [2021-12-18 19:58:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:07,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 19:58:07,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:07,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567445869] [2021-12-18 19:58:07,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567445869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:07,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009727290] [2021-12-18 19:58:07,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:58:07,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:07,751 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:07,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:58:07,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:58:07,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-18 19:58:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-18 19:58:08,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:08,362 INFO L354 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2021-12-18 19:58:08,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-12-18 19:58:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-18 19:58:08,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009727290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:08,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:08,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 40 [2021-12-18 19:58:08,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60020851] [2021-12-18 19:58:08,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:08,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 19:58:08,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 19:58:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:58:08,509 INFO L87 Difference]: Start difference. First operand 404 states and 445 transitions. Second operand has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:10,592 INFO L93 Difference]: Finished difference Result 939 states and 1018 transitions. [2021-12-18 19:58:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-18 19:58:10,592 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-18 19:58:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:10,594 INFO L225 Difference]: With dead ends: 939 [2021-12-18 19:58:10,594 INFO L226 Difference]: Without dead ends: 817 [2021-12-18 19:58:10,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1051, Invalid=5755, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 19:58:10,595 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 499 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:10,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 968 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:58:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-18 19:58:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 536. [2021-12-18 19:58:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 534 states have (on average 1.1123595505617978) internal successors, (594), 535 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 594 transitions. [2021-12-18 19:58:10,602 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 594 transitions. Word has length 74 [2021-12-18 19:58:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:10,602 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 594 transitions. [2021-12-18 19:58:10,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 594 transitions. [2021-12-18 19:58:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 19:58:10,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:10,603 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:10,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:10,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:10,816 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1706384470, now seen corresponding path program 9 times [2021-12-18 19:58:10,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:10,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195827278] [2021-12-18 19:58:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:10,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:11,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:11,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195827278] [2021-12-18 19:58:11,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195827278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:11,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546930503] [2021-12-18 19:58:11,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:58:11,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:11,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:11,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:11,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:58:11,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 19:58:11,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 19:58:11,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:11,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:11,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:58:11,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:11,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:58:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:58:14,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-18 19:58:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:14,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:15,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-18 19:58:15,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-18 19:58:15,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-18 19:58:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:15,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546930503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:15,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:15,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 50 [2021-12-18 19:58:15,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920157157] [2021-12-18 19:58:15,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:15,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:58:15,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:58:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2241, Unknown=1, NotChecked=0, Total=2450 [2021-12-18 19:58:15,909 INFO L87 Difference]: Start difference. First operand 536 states and 594 transitions. Second operand has 50 states, 50 states have (on average 4.14) internal successors, (207), 50 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:17,006 INFO L93 Difference]: Finished difference Result 871 states and 963 transitions. [2021-12-18 19:58:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 19:58:17,006 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.14) internal successors, (207), 50 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-18 19:58:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:17,008 INFO L225 Difference]: With dead ends: 871 [2021-12-18 19:58:17,008 INFO L226 Difference]: Without dead ends: 684 [2021-12-18 19:58:17,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=573, Invalid=5278, Unknown=1, NotChecked=0, Total=5852 [2021-12-18 19:58:17,008 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 205 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:17,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1299 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 474 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2021-12-18 19:58:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-12-18 19:58:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 611. [2021-12-18 19:58:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 609 states have (on average 1.1083743842364533) internal successors, (675), 610 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 675 transitions. [2021-12-18 19:58:17,016 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 675 transitions. Word has length 77 [2021-12-18 19:58:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:17,016 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 675 transitions. [2021-12-18 19:58:17,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.14) internal successors, (207), 50 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 675 transitions. [2021-12-18 19:58:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 19:58:17,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:17,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:17,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:17,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:17,231 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 559244973, now seen corresponding path program 10 times [2021-12-18 19:58:17,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625378755] [2021-12-18 19:58:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:17,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 32 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:17,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625378755] [2021-12-18 19:58:17,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625378755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135014761] [2021-12-18 19:58:17,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:58:17,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:17,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:17,410 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:17,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:58:17,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:58:17,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:58:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:17,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:18,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:58:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:18,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135014761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:18,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:18,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-18 19:58:18,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649999153] [2021-12-18 19:58:18,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:18,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:58:18,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:18,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:58:18,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:58:18,169 INFO L87 Difference]: Start difference. First operand 611 states and 675 transitions. Second operand has 35 states, 34 states have (on average 5.088235294117647) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:18,756 INFO L93 Difference]: Finished difference Result 755 states and 825 transitions. [2021-12-18 19:58:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:58:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.088235294117647) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-18 19:58:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:18,758 INFO L225 Difference]: With dead ends: 755 [2021-12-18 19:58:18,758 INFO L226 Difference]: Without dead ends: 755 [2021-12-18 19:58:18,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:58:18,759 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 328 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:18,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1015 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:58:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-18 19:58:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 673. [2021-12-18 19:58:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 671 states have (on average 1.1102831594634874) internal successors, (745), 672 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 745 transitions. [2021-12-18 19:58:18,768 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 745 transitions. Word has length 81 [2021-12-18 19:58:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:18,768 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 745 transitions. [2021-12-18 19:58:18,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.088235294117647) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 745 transitions. [2021-12-18 19:58:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 19:58:18,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:18,769 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:18,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:18,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-18 19:58:18,983 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:18,984 INFO L85 PathProgramCache]: Analyzing trace with hash -170902987, now seen corresponding path program 4 times [2021-12-18 19:58:18,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:18,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164908607] [2021-12-18 19:58:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:18,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 6 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 19:58:19,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164908607] [2021-12-18 19:58:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164908607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712830055] [2021-12-18 19:58:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:58:19,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:19,165 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:19,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:58:19,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:58:19,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:58:19,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 19:58:19,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:19,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:58:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 19:58:19,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712830055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:19,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:19,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2021-12-18 19:58:19,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296116052] [2021-12-18 19:58:19,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:19,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:58:19,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:58:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:58:19,852 INFO L87 Difference]: Start difference. First operand 673 states and 745 transitions. Second operand has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:20,352 INFO L93 Difference]: Finished difference Result 1137 states and 1242 transitions. [2021-12-18 19:58:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:58:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-18 19:58:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:20,356 INFO L225 Difference]: With dead ends: 1137 [2021-12-18 19:58:20,356 INFO L226 Difference]: Without dead ends: 1137 [2021-12-18 19:58:20,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:58:20,357 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 261 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:20,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 547 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:58:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-12-18 19:58:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 699. [2021-12-18 19:58:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 697 states have (on average 1.1061692969870875) internal successors, (771), 698 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 771 transitions. [2021-12-18 19:58:20,367 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 771 transitions. Word has length 83 [2021-12-18 19:58:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:20,368 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 771 transitions. [2021-12-18 19:58:20,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 771 transitions. [2021-12-18 19:58:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-18 19:58:20,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:20,369 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:20,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:20,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 19:58:20,586 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2134117084, now seen corresponding path program 5 times [2021-12-18 19:58:20,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563307588] [2021-12-18 19:58:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:20,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 143 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-18 19:58:21,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563307588] [2021-12-18 19:58:21,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563307588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074843018] [2021-12-18 19:58:21,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:58:21,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:21,239 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:21,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:58:21,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:58:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 19:58:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:21,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:58:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 26 proven. 127 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 19:58:21,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 26 proven. 127 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 19:58:22,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074843018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:22,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:22,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 17] total 43 [2021-12-18 19:58:22,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791974791] [2021-12-18 19:58:22,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:22,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:58:22,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:58:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:58:22,138 INFO L87 Difference]: Start difference. First operand 699 states and 771 transitions. Second operand has 43 states, 43 states have (on average 3.511627906976744) internal successors, (151), 43 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:27,104 INFO L93 Difference]: Finished difference Result 1279 states and 1392 transitions. [2021-12-18 19:58:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-18 19:58:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.511627906976744) internal successors, (151), 43 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-18 19:58:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:27,107 INFO L225 Difference]: With dead ends: 1279 [2021-12-18 19:58:27,107 INFO L226 Difference]: Without dead ends: 1130 [2021-12-18 19:58:27,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1669, Invalid=12611, Unknown=0, NotChecked=0, Total=14280 [2021-12-18 19:58:27,109 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 602 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:27,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 1806 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 19:58:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-12-18 19:58:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 854. [2021-12-18 19:58:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 852 states have (on average 1.1126760563380282) internal successors, (948), 853 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 948 transitions. [2021-12-18 19:58:27,119 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 948 transitions. Word has length 88 [2021-12-18 19:58:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:27,120 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 948 transitions. [2021-12-18 19:58:27,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.511627906976744) internal successors, (151), 43 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 948 transitions. [2021-12-18 19:58:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-18 19:58:27,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:27,121 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:27,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:27,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 19:58:27,345 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:27,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1115496951, now seen corresponding path program 11 times [2021-12-18 19:58:27,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:27,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141180321] [2021-12-18 19:58:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:27,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:27,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141180321] [2021-12-18 19:58:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141180321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385681830] [2021-12-18 19:58:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:58:27,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:27,902 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:27,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:58:28,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 19:58:28,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 19:58:28,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:28,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:28,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:58:28,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:28,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:28,797 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1098) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-18 19:58:28,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:58:28,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:28,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:58:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:58:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:29,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385681830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:29,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:29,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 22] total 46 [2021-12-18 19:58:29,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667964763] [2021-12-18 19:58:29,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:29,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:58:29,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:58:29,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1869, Unknown=1, NotChecked=86, Total=2070 [2021-12-18 19:58:29,073 INFO L87 Difference]: Start difference. First operand 854 states and 948 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:30,550 INFO L93 Difference]: Finished difference Result 1355 states and 1502 transitions. [2021-12-18 19:58:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:58:30,550 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-18 19:58:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:30,553 INFO L225 Difference]: With dead ends: 1355 [2021-12-18 19:58:30,553 INFO L226 Difference]: Without dead ends: 1033 [2021-12-18 19:58:30,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=4551, Unknown=1, NotChecked=136, Total=4970 [2021-12-18 19:58:30,554 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 225 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:30,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 2343 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2113 Invalid, 0 Unknown, 142 Unchecked, 0.7s Time] [2021-12-18 19:58:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-12-18 19:58:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 939. [2021-12-18 19:58:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 937 states have (on average 1.1088580576307363) internal successors, (1039), 938 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1039 transitions. [2021-12-18 19:58:30,563 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1039 transitions. Word has length 89 [2021-12-18 19:58:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:30,563 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1039 transitions. [2021-12-18 19:58:30,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1039 transitions. [2021-12-18 19:58:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-18 19:58:30,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:30,565 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:30,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:30,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 19:58:30,775 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:30,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash 604272762, now seen corresponding path program 12 times [2021-12-18 19:58:30,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:30,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085412293] [2021-12-18 19:58:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:30,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 50 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:30,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085412293] [2021-12-18 19:58:30,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085412293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101638910] [2021-12-18 19:58:30,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:58:30,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:30,997 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:30,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:58:31,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 19:58:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:58:31,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:31,168 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:58:31,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:58:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 72 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:31,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 72 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:32,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101638910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:32,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:32,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-12-18 19:58:32,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793532900] [2021-12-18 19:58:32,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:32,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 19:58:32,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 19:58:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2374, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 19:58:32,212 INFO L87 Difference]: Start difference. First operand 939 states and 1039 transitions. Second operand has 53 states, 52 states have (on average 5.211538461538462) internal successors, (271), 53 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:33,026 INFO L93 Difference]: Finished difference Result 1212 states and 1327 transitions. [2021-12-18 19:58:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:58:33,026 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 5.211538461538462) internal successors, (271), 53 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-18 19:58:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:33,030 INFO L225 Difference]: With dead ends: 1212 [2021-12-18 19:58:33,030 INFO L226 Difference]: Without dead ends: 1212 [2021-12-18 19:58:33,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1067, Invalid=4189, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 19:58:33,031 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 523 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:33,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 1357 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:58:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-12-18 19:58:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1029. [2021-12-18 19:58:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1027 states have (on average 1.1110029211295034) internal successors, (1141), 1028 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1141 transitions. [2021-12-18 19:58:33,042 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1141 transitions. Word has length 93 [2021-12-18 19:58:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:33,042 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1141 transitions. [2021-12-18 19:58:33,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 5.211538461538462) internal successors, (271), 53 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1141 transitions. [2021-12-18 19:58:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-18 19:58:33,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:33,044 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:33,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:33,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:58:33,261 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash -119897556, now seen corresponding path program 6 times [2021-12-18 19:58:33,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:33,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174496506] [2021-12-18 19:58:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:33,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 15 proven. 174 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-18 19:58:33,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174496506] [2021-12-18 19:58:33,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174496506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546148498] [2021-12-18 19:58:33,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:58:33,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:33,484 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:33,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:58:33,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:58:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 19:58:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:33,645 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:58:33,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:58:33,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:58:34,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:34,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 19:58:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 34 proven. 123 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-18 19:58:34,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:58:35,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:58:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 18 proven. 139 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-18 19:58:36,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546148498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:36,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:36,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 43 [2021-12-18 19:58:36,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450370426] [2021-12-18 19:58:36,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:36,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:58:36,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:58:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:58:36,251 INFO L87 Difference]: Start difference. First operand 1029 states and 1141 transitions. Second operand has 44 states, 43 states have (on average 3.744186046511628) internal successors, (161), 44 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:40,781 INFO L93 Difference]: Finished difference Result 2395 states and 2613 transitions. [2021-12-18 19:58:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-18 19:58:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.744186046511628) internal successors, (161), 44 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-18 19:58:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:40,786 INFO L225 Difference]: With dead ends: 2395 [2021-12-18 19:58:40,786 INFO L226 Difference]: Without dead ends: 1842 [2021-12-18 19:58:40,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4400 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3463, Invalid=14627, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 19:58:40,787 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 380 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:40,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 758 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1175 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2021-12-18 19:58:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-12-18 19:58:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 718. [2021-12-18 19:58:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.1199442119944212) internal successors, (803), 717 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 803 transitions. [2021-12-18 19:58:40,798 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 803 transitions. Word has length 97 [2021-12-18 19:58:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:40,798 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 803 transitions. [2021-12-18 19:58:40,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.744186046511628) internal successors, (161), 44 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 803 transitions. [2021-12-18 19:58:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:58:40,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:40,799 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:40,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:41,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-18 19:58:41,016 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1817712324, now seen corresponding path program 13 times [2021-12-18 19:58:41,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864656134] [2021-12-18 19:58:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:41,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:41,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:41,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864656134] [2021-12-18 19:58:41,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864656134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:41,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968852440] [2021-12-18 19:58:41,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:58:41,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:41,378 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:41,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:58:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:41,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-18 19:58:41,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:41,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:41,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:41,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:58:42,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:42,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:42,214 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1258 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1258) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-12-18 19:58:42,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:42,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:58:42,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:42,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:58:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:58:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:42,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968852440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:42,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:42,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2021-12-18 19:58:42,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710887096] [2021-12-18 19:58:42,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:42,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 19:58:42,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:42,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 19:58:42,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1526, Unknown=1, NotChecked=78, Total=1722 [2021-12-18 19:58:42,472 INFO L87 Difference]: Start difference. First operand 718 states and 803 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:43,500 INFO L93 Difference]: Finished difference Result 1305 states and 1454 transitions. [2021-12-18 19:58:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:58:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 19:58:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:43,504 INFO L225 Difference]: With dead ends: 1305 [2021-12-18 19:58:43,504 INFO L226 Difference]: Without dead ends: 732 [2021-12-18 19:58:43,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=346, Invalid=3563, Unknown=1, NotChecked=122, Total=4032 [2021-12-18 19:58:43,505 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 249 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:43,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1662 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1242 Invalid, 0 Unknown, 188 Unchecked, 0.4s Time] [2021-12-18 19:58:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-12-18 19:58:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 726. [2021-12-18 19:58:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.1186206896551725) internal successors, (811), 725 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 811 transitions. [2021-12-18 19:58:43,513 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 811 transitions. Word has length 101 [2021-12-18 19:58:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:43,513 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 811 transitions. [2021-12-18 19:58:43,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 811 transitions. [2021-12-18 19:58:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-18 19:58:43,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:43,515 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:43,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:43,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:43,731 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1285210311, now seen corresponding path program 14 times [2021-12-18 19:58:43,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222227727] [2021-12-18 19:58:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:43,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:44,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222227727] [2021-12-18 19:58:44,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222227727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608434890] [2021-12-18 19:58:44,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:58:44,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:44,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:44,009 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:44,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:58:44,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:58:44,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 19:58:44,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:44,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:58:44,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:58:44,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 91 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:45,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 120 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:45,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608434890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:45,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:45,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2021-12-18 19:58:45,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369344727] [2021-12-18 19:58:45,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:45,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 19:58:45,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 19:58:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=3076, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:58:45,937 INFO L87 Difference]: Start difference. First operand 726 states and 811 transitions. Second operand has 59 states, 58 states have (on average 5.293103448275862) internal successors, (307), 59 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:46,997 INFO L93 Difference]: Finished difference Result 826 states and 922 transitions. [2021-12-18 19:58:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 19:58:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 5.293103448275862) internal successors, (307), 59 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-18 19:58:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:46,999 INFO L225 Difference]: With dead ends: 826 [2021-12-18 19:58:46,999 INFO L226 Difference]: Without dead ends: 826 [2021-12-18 19:58:47,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1256, Invalid=5884, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 19:58:47,000 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1204 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:47,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 1019 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:58:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-12-18 19:58:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 816. [2021-12-18 19:58:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 1.1190184049079754) internal successors, (912), 815 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 912 transitions. [2021-12-18 19:58:47,008 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 912 transitions. Word has length 105 [2021-12-18 19:58:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:47,008 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 912 transitions. [2021-12-18 19:58:47,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 5.293103448275862) internal successors, (307), 59 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 912 transitions. [2021-12-18 19:58:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 19:58:47,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:47,009 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:47,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:47,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:47,227 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1992016401, now seen corresponding path program 15 times [2021-12-18 19:58:47,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:47,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483170529] [2021-12-18 19:58:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:47,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:47,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:47,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483170529] [2021-12-18 19:58:47,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483170529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076658549] [2021-12-18 19:58:47,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:58:47,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:47,619 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:47,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:58:47,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 19:58:47,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-18 19:58:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:48,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:48,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:58:48,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:48,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:48,628 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1375 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1375) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-18 19:58:48,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:48,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:58:48,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:48,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:58:48,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:58:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:48,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076658549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:48,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:48,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2021-12-18 19:58:48,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120948578] [2021-12-18 19:58:48,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:48,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 19:58:48,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 19:58:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1771, Unknown=1, NotChecked=84, Total=1980 [2021-12-18 19:58:48,919 INFO L87 Difference]: Start difference. First operand 816 states and 912 transitions. Second operand has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:49,987 INFO L93 Difference]: Finished difference Result 1493 states and 1664 transitions. [2021-12-18 19:58:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:58:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-18 19:58:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:49,990 INFO L225 Difference]: With dead ends: 1493 [2021-12-18 19:58:49,990 INFO L226 Difference]: Without dead ends: 830 [2021-12-18 19:58:49,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=306, Invalid=4253, Unknown=1, NotChecked=132, Total=4692 [2021-12-18 19:58:49,990 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 146 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:49,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1809 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1464 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2021-12-18 19:58:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-12-18 19:58:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 824. [2021-12-18 19:58:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.117861482381531) internal successors, (920), 823 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 920 transitions. [2021-12-18 19:58:49,998 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 920 transitions. Word has length 113 [2021-12-18 19:58:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:49,998 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 920 transitions. [2021-12-18 19:58:49,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 920 transitions. [2021-12-18 19:58:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-18 19:58:49,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:49,999 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:50,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:50,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-18 19:58:50,215 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -774340716, now seen corresponding path program 16 times [2021-12-18 19:58:50,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367098905] [2021-12-18 19:58:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:50,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 98 proven. 295 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:50,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367098905] [2021-12-18 19:58:50,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367098905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:50,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318698817] [2021-12-18 19:58:50,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:58:50,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:50,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:50,504 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:50,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:58:50,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:58:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 19:58:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:51,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:51,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:58:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:51,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318698817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:51,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:51,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 46 [2021-12-18 19:58:51,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096739612] [2021-12-18 19:58:51,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:51,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:58:51,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:51,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:58:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:58:51,655 INFO L87 Difference]: Start difference. First operand 824 states and 920 transitions. Second operand has 47 states, 46 states have (on average 5.326086956521739) internal successors, (245), 47 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:52,390 INFO L93 Difference]: Finished difference Result 926 states and 1033 transitions. [2021-12-18 19:58:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:58:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.326086956521739) internal successors, (245), 47 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-18 19:58:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:52,392 INFO L225 Difference]: With dead ends: 926 [2021-12-18 19:58:52,392 INFO L226 Difference]: Without dead ends: 926 [2021-12-18 19:58:52,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=857, Invalid=3565, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:58:52,393 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 449 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:52,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1160 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:58:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-12-18 19:58:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 914. [2021-12-18 19:58:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 1.11829134720701) internal successors, (1021), 913 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1021 transitions. [2021-12-18 19:58:52,402 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1021 transitions. Word has length 117 [2021-12-18 19:58:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:52,402 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1021 transitions. [2021-12-18 19:58:52,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.326086956521739) internal successors, (245), 47 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1021 transitions. [2021-12-18 19:58:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-18 19:58:52,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:52,404 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:52,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:52,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:52,617 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:58:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash -198679586, now seen corresponding path program 17 times [2021-12-18 19:58:52,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:52,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578210687] [2021-12-18 19:58:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:52,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:53,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578210687] [2021-12-18 19:58:53,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578210687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547323211] [2021-12-18 19:58:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:58:53,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:53,370 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:53,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:58:53,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-18 19:58:53,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:53,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-18 19:58:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:54,235 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:58:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 19:58:54,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-18 19:58:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:58:56,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:58:56,965 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 19:58:56,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2021-12-18 19:58:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:57,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:57,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2021-12-18 19:58:57,907 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-18 19:58:57,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2021-12-18 19:58:57,924 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-18 19:58:57,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2021-12-18 19:58:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 54 proven. 405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:59,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547323211] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:59,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:59,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 92 [2021-12-18 19:58:59,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504692858] [2021-12-18 19:58:59,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:59,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-18 19:58:59,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:59,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-18 19:58:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=8064, Unknown=15, NotChecked=0, Total=8372 [2021-12-18 19:58:59,211 INFO L87 Difference]: Start difference. First operand 914 states and 1021 transitions. Second operand has 92 states, 92 states have (on average 3.4456521739130435) internal successors, (317), 92 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:03,506 INFO L93 Difference]: Finished difference Result 1056 states and 1171 transitions. [2021-12-18 19:59:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 19:59:03,506 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.4456521739130435) internal successors, (317), 92 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-18 19:59:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:03,508 INFO L225 Difference]: With dead ends: 1056 [2021-12-18 19:59:03,508 INFO L226 Difference]: Without dead ends: 979 [2021-12-18 19:59:03,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2665 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=489, Invalid=12601, Unknown=20, NotChecked=0, Total=13110 [2021-12-18 19:59:03,509 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:03,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1257 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1618 Invalid, 0 Unknown, 267 Unchecked, 0.6s Time] [2021-12-18 19:59:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-12-18 19:59:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 973. [2021-12-18 19:59:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.1152263374485596) internal successors, (1084), 972 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1084 transitions. [2021-12-18 19:59:03,518 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1084 transitions. Word has length 125 [2021-12-18 19:59:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:03,518 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1084 transitions. [2021-12-18 19:59:03,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.4456521739130435) internal successors, (317), 92 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1084 transitions. [2021-12-18 19:59:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-18 19:59:03,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:03,520 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:03,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:03,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-18 19:59:03,735 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1310586081, now seen corresponding path program 18 times [2021-12-18 19:59:03,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258914885] [2021-12-18 19:59:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:03,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 128 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:04,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258914885] [2021-12-18 19:59:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258914885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071746828] [2021-12-18 19:59:04,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:59:04,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:04,055 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:04,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:59:04,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 19:59:04,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 19:59:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 153 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:04,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:59:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 153 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:05,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071746828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:05,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:05,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 61 [2021-12-18 19:59:05,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442106101] [2021-12-18 19:59:05,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:05,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-18 19:59:05,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:05,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-18 19:59:05,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=3258, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 19:59:05,605 INFO L87 Difference]: Start difference. First operand 973 states and 1084 transitions. Second operand has 62 states, 61 states have (on average 5.426229508196721) internal successors, (331), 62 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:06,604 INFO L93 Difference]: Finished difference Result 1833 states and 2052 transitions. [2021-12-18 19:59:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:59:06,605 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 5.426229508196721) internal successors, (331), 62 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-18 19:59:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:06,608 INFO L225 Difference]: With dead ends: 1833 [2021-12-18 19:59:06,608 INFO L226 Difference]: Without dead ends: 1833 [2021-12-18 19:59:06,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1459, Invalid=5851, Unknown=0, NotChecked=0, Total=7310 [2021-12-18 19:59:06,609 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 540 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:06,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 1295 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:59:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-12-18 19:59:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1073. [2021-12-18 19:59:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 1.1166044776119404) internal successors, (1197), 1072 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1197 transitions. [2021-12-18 19:59:06,621 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1197 transitions. Word has length 129 [2021-12-18 19:59:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:06,621 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1197 transitions. [2021-12-18 19:59:06,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 5.426229508196721) internal successors, (331), 62 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1197 transitions. [2021-12-18 19:59:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-18 19:59:06,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:06,623 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:06,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:06,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:06,839 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash -701200990, now seen corresponding path program 1 times [2021-12-18 19:59:06,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:06,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331912634] [2021-12-18 19:59:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:06,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 148 proven. 12 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-12-18 19:59:06,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:06,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331912634] [2021-12-18 19:59:06,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331912634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:06,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965531394] [2021-12-18 19:59:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:06,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:06,928 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:06,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:59:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:07,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 19:59:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:07,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:07,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 19:59:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 182 proven. 26 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-18 19:59:07,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 190 proven. 12 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-18 19:59:07,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965531394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:07,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:07,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 21 [2021-12-18 19:59:07,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483589686] [2021-12-18 19:59:07,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:07,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:59:07,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:59:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:59:07,549 INFO L87 Difference]: Start difference. First operand 1073 states and 1197 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:08,072 INFO L93 Difference]: Finished difference Result 1344 states and 1431 transitions. [2021-12-18 19:59:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 19:59:08,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-12-18 19:59:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:08,076 INFO L225 Difference]: With dead ends: 1344 [2021-12-18 19:59:08,076 INFO L226 Difference]: Without dead ends: 1344 [2021-12-18 19:59:08,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:59:08,077 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 206 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:08,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 412 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:59:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-12-18 19:59:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1065. [2021-12-18 19:59:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 1.0836466165413534) internal successors, (1153), 1064 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1153 transitions. [2021-12-18 19:59:08,087 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1153 transitions. Word has length 134 [2021-12-18 19:59:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:08,087 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1153 transitions. [2021-12-18 19:59:08,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1153 transitions. [2021-12-18 19:59:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 19:59:08,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:08,088 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:08,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:08,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 19:59:08,299 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash 985545771, now seen corresponding path program 19 times [2021-12-18 19:59:08,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:08,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550750208] [2021-12-18 19:59:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:08,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:09,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550750208] [2021-12-18 19:59:09,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550750208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037716767] [2021-12-18 19:59:09,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:59:09,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:09,117 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:09,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:59:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-18 19:59:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:09,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:59:09,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:10,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:59:11,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:59:11,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:11,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-18 19:59:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:11,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:11,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:11,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:59:11,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:11,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:59:11,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:59:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:12,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037716767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:12,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:12,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31, 31] total 80 [2021-12-18 19:59:12,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018919768] [2021-12-18 19:59:12,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:12,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 19:59:12,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 19:59:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=6079, Unknown=1, NotChecked=0, Total=6320 [2021-12-18 19:59:12,503 INFO L87 Difference]: Start difference. First operand 1065 states and 1153 transitions. Second operand has 80 states, 80 states have (on average 4.0125) internal successors, (321), 80 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:13,862 INFO L93 Difference]: Finished difference Result 1984 states and 2147 transitions. [2021-12-18 19:59:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:59:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.0125) internal successors, (321), 80 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-12-18 19:59:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:13,866 INFO L225 Difference]: With dead ends: 1984 [2021-12-18 19:59:13,867 INFO L226 Difference]: Without dead ends: 1899 [2021-12-18 19:59:13,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=364, Invalid=8755, Unknown=1, NotChecked=0, Total=9120 [2021-12-18 19:59:13,868 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 190 mSDsluCounter, 4423 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 4510 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:13,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 4510 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2316 Invalid, 0 Unknown, 566 Unchecked, 0.8s Time] [2021-12-18 19:59:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-12-18 19:59:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1124. [2021-12-18 19:59:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 1.0828138913624221) internal successors, (1216), 1123 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1216 transitions. [2021-12-18 19:59:13,881 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1216 transitions. Word has length 137 [2021-12-18 19:59:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:13,881 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1216 transitions. [2021-12-18 19:59:13,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.0125) internal successors, (321), 80 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1216 transitions. [2021-12-18 19:59:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 19:59:13,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:13,883 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:13,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:14,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-18 19:59:14,099 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1332437166, now seen corresponding path program 20 times [2021-12-18 19:59:14,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:14,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281097144] [2021-12-18 19:59:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:14,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 162 proven. 449 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:14,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:14,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281097144] [2021-12-18 19:59:14,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281097144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:14,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884342160] [2021-12-18 19:59:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:59:14,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:14,460 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:14,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:59:14,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:59:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-18 19:59:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 190 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:15,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:15,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:59:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 190 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:15,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884342160] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:15,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:15,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2021-12-18 19:59:15,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578965640] [2021-12-18 19:59:15,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:15,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 19:59:15,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 19:59:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2716, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:59:15,941 INFO L87 Difference]: Start difference. First operand 1124 states and 1216 transitions. Second operand has 56 states, 55 states have (on average 5.1454545454545455) internal successors, (283), 56 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:17,113 INFO L93 Difference]: Finished difference Result 2706 states and 2938 transitions. [2021-12-18 19:59:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 19:59:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 5.1454545454545455) internal successors, (283), 56 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-18 19:59:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:17,119 INFO L225 Difference]: With dead ends: 2706 [2021-12-18 19:59:17,119 INFO L226 Difference]: Without dead ends: 2706 [2021-12-18 19:59:17,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1336, Invalid=5470, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 19:59:17,120 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 481 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:17,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 2015 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:59:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-12-18 19:59:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1216. [2021-12-18 19:59:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 1.0839506172839506) internal successors, (1317), 1215 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1317 transitions. [2021-12-18 19:59:17,141 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1317 transitions. Word has length 141 [2021-12-18 19:59:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:17,141 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1317 transitions. [2021-12-18 19:59:17,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 5.1454545454545455) internal successors, (283), 56 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1317 transitions. [2021-12-18 19:59:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-18 19:59:17,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:17,143 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:17,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:17,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 19:59:17,364 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash -197293320, now seen corresponding path program 21 times [2021-12-18 19:59:17,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:17,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290959535] [2021-12-18 19:59:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:17,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:17,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290959535] [2021-12-18 19:59:17,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290959535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109486934] [2021-12-18 19:59:17,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:59:17,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:17,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:17,926 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:17,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:59:18,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-18 19:59:18,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-18 19:59:18,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:18,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:59:18,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:59:19,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:19,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:59:45,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:59:45,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-18 19:59:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 383 proven. 261 refuted. 49 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:46,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:46,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-18 19:59:46,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:46,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-18 19:59:46,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-18 19:59:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 432 proven. 261 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:48,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109486934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:48,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:48,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 86 [2021-12-18 19:59:48,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236359957] [2021-12-18 19:59:48,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:48,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-18 19:59:48,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-18 19:59:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=6716, Unknown=8, NotChecked=0, Total=7310 [2021-12-18 19:59:48,425 INFO L87 Difference]: Start difference. First operand 1216 states and 1317 transitions. Second operand has 86 states, 86 states have (on average 4.9186046511627906) internal successors, (423), 86 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:03,916 INFO L93 Difference]: Finished difference Result 3639 states and 3945 transitions. [2021-12-18 20:00:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 20:00:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.9186046511627906) internal successors, (423), 86 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-18 20:00:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:03,922 INFO L225 Difference]: With dead ends: 3639 [2021-12-18 20:00:03,922 INFO L226 Difference]: Without dead ends: 2706 [2021-12-18 20:00:03,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 256 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1484, Invalid=16061, Unknown=11, NotChecked=0, Total=17556 [2021-12-18 20:00:03,924 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 292 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 4838 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:03,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 4838 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1366 Invalid, 0 Unknown, 551 Unchecked, 0.5s Time] [2021-12-18 20:00:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-12-18 20:00:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2664. [2021-12-18 20:00:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2663 states have (on average 1.0852422080360495) internal successors, (2890), 2663 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 2890 transitions. [2021-12-18 20:00:03,952 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 2890 transitions. Word has length 149 [2021-12-18 20:00:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:03,952 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 2890 transitions. [2021-12-18 20:00:03,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.9186046511627906) internal successors, (423), 86 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 2890 transitions. [2021-12-18 20:00:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-18 20:00:03,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:03,955 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:03,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-18 20:00:04,163 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash -413072645, now seen corresponding path program 22 times [2021-12-18 20:00:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:04,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029225098] [2021-12-18 20:00:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:04,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 200 proven. 538 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:04,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:04,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029225098] [2021-12-18 20:00:04,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029225098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:04,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272446465] [2021-12-18 20:00:04,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:00:04,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:04,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:04,569 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:04,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 20:00:04,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:00:04,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:04,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-18 20:00:04,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 242 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:05,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:06,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 20:00:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 242 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:06,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272446465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:06,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:06,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 58 [2021-12-18 20:00:06,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869126448] [2021-12-18 20:00:06,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:06,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 20:00:06,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 20:00:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 20:00:06,175 INFO L87 Difference]: Start difference. First operand 2664 states and 2890 transitions. Second operand has 59 states, 58 states have (on average 5.4655172413793105) internal successors, (317), 59 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:07,583 INFO L93 Difference]: Finished difference Result 2814 states and 3048 transitions. [2021-12-18 20:00:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 20:00:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 5.4655172413793105) internal successors, (317), 59 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-12-18 20:00:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:07,594 INFO L225 Difference]: With dead ends: 2814 [2021-12-18 20:00:07,594 INFO L226 Difference]: Without dead ends: 2814 [2021-12-18 20:00:07,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1452, Invalid=6030, Unknown=0, NotChecked=0, Total=7482 [2021-12-18 20:00:07,595 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 632 mSDsluCounter, 2589 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:07,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 2724 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:00:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-12-18 20:00:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2754. [2021-12-18 20:00:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2753 states have (on average 1.0849981837994915) internal successors, (2987), 2753 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 2987 transitions. [2021-12-18 20:00:07,613 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 2987 transitions. Word has length 153 [2021-12-18 20:00:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:07,613 INFO L470 AbstractCegarLoop]: Abstraction has 2754 states and 2987 transitions. [2021-12-18 20:00:07,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 5.4655172413793105) internal successors, (317), 59 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 2987 transitions. [2021-12-18 20:00:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-18 20:00:07,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:07,615 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:07,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:07,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:07,819 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:07,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1375301563, now seen corresponding path program 23 times [2021-12-18 20:00:07,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:07,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555019494] [2021-12-18 20:00:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:07,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:08,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555019494] [2021-12-18 20:00:08,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555019494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455013576] [2021-12-18 20:00:08,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:00:08,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:08,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:08,527 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:08,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 20:00:08,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 20:00:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 149 conjunts are in the unsatisfiable core [2021-12-18 20:00:08,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:00:09,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:00:09,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:00:09,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:00:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:09,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:09,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1969 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1969) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0)) is different from false [2021-12-18 20:00:09,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:09,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:00:09,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:09,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:00:09,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:00:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:10,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455013576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:10,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:10,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 57 [2021-12-18 20:00:10,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028967707] [2021-12-18 20:00:10,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:10,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 20:00:10,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 20:00:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2931, Unknown=1, NotChecked=108, Total=3192 [2021-12-18 20:00:10,321 INFO L87 Difference]: Start difference. First operand 2754 states and 2987 transitions. Second operand has 57 states, 57 states have (on average 4.052631578947368) internal successors, (231), 57 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:12,259 INFO L93 Difference]: Finished difference Result 3839 states and 4152 transitions. [2021-12-18 20:00:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 20:00:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.052631578947368) internal successors, (231), 57 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-18 20:00:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:12,270 INFO L225 Difference]: With dead ends: 3839 [2021-12-18 20:00:12,271 INFO L226 Difference]: Without dead ends: 2816 [2021-12-18 20:00:12,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 296 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=293, Invalid=5562, Unknown=1, NotChecked=150, Total=6006 [2021-12-18 20:00:12,271 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 223 mSDsluCounter, 5268 mSDsCounter, 0 mSdLazyCounter, 3724 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 5401 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:12,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 5401 Invalid, 4129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3724 Invalid, 0 Unknown, 376 Unchecked, 1.2s Time] [2021-12-18 20:00:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2021-12-18 20:00:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2762. [2021-12-18 20:00:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2761 states have (on average 1.0847519014849691) internal successors, (2995), 2761 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 2995 transitions. [2021-12-18 20:00:12,291 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 2995 transitions. Word has length 161 [2021-12-18 20:00:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:12,291 INFO L470 AbstractCegarLoop]: Abstraction has 2762 states and 2995 transitions. [2021-12-18 20:00:12,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.052631578947368) internal successors, (231), 57 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 2995 transitions. [2021-12-18 20:00:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-18 20:00:12,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:12,294 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:12,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:12,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:12,499 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 993991624, now seen corresponding path program 24 times [2021-12-18 20:00:12,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74760226] [2021-12-18 20:00:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:12,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 242 proven. 635 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:12,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74760226] [2021-12-18 20:00:12,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74760226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230424671] [2021-12-18 20:00:12,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:00:12,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:12,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:12,999 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:13,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 20:00:13,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 20:00:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:13,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-18 20:00:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 276 proven. 601 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:14,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:15,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 20:00:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 276 proven. 601 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:15,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230424671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:15,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:15,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 76 [2021-12-18 20:00:15,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460990962] [2021-12-18 20:00:15,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:15,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-18 20:00:15,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-18 20:00:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=5025, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 20:00:15,495 INFO L87 Difference]: Start difference. First operand 2762 states and 2995 transitions. Second operand has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:17,009 INFO L93 Difference]: Finished difference Result 2912 states and 3153 transitions. [2021-12-18 20:00:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 20:00:17,010 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-12-18 20:00:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:17,013 INFO L225 Difference]: With dead ends: 2912 [2021-12-18 20:00:17,013 INFO L226 Difference]: Without dead ends: 2912 [2021-12-18 20:00:17,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2305, Invalid=9251, Unknown=0, NotChecked=0, Total=11556 [2021-12-18 20:00:17,015 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1225 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:17,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 2001 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:00:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-12-18 20:00:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2852. [2021-12-18 20:00:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 1.084531743247983) internal successors, (3092), 2851 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3092 transitions. [2021-12-18 20:00:17,042 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3092 transitions. Word has length 165 [2021-12-18 20:00:17,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:17,042 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 3092 transitions. [2021-12-18 20:00:17,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3092 transitions. [2021-12-18 20:00:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-18 20:00:17,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:17,045 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:17,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:17,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-18 20:00:17,245 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1763281938, now seen corresponding path program 25 times [2021-12-18 20:00:17,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:17,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194864450] [2021-12-18 20:00:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:17,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 74 proven. 901 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:18,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194864450] [2021-12-18 20:00:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194864450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292268789] [2021-12-18 20:00:18,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:00:18,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:18,461 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:18,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 20:00:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:18,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-18 20:00:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:18,715 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:00:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:00:19,665 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:19,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:00:19,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-18 20:00:22,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:00:22,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 20:00:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:00:23,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:23,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:00:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 74 proven. 901 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:23,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:24,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:24,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:00:24,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:24,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:00:24,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:00:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 74 proven. 901 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:26,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292268789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:26,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:26,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 104 [2021-12-18 20:00:26,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918843934] [2021-12-18 20:00:26,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:26,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 20:00:26,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:26,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 20:00:26,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=10440, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 20:00:26,555 INFO L87 Difference]: Start difference. First operand 2852 states and 3092 transitions. Second operand has 104 states, 104 states have (on average 4.240384615384615) internal successors, (441), 104 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:32,012 INFO L93 Difference]: Finished difference Result 3177 states and 3426 transitions. [2021-12-18 20:00:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-18 20:00:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.240384615384615) internal successors, (441), 104 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-18 20:00:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:32,020 INFO L225 Difference]: With dead ends: 3177 [2021-12-18 20:00:32,020 INFO L226 Difference]: Without dead ends: 2967 [2021-12-18 20:00:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3895 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=731, Invalid=26991, Unknown=0, NotChecked=0, Total=27722 [2021-12-18 20:00:32,022 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 337 mSDsluCounter, 7924 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 8034 SdHoareTripleChecker+Invalid, 8259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4517 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:32,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 8034 Invalid, 8259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3680 Invalid, 0 Unknown, 4517 Unchecked, 1.4s Time] [2021-12-18 20:00:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-12-18 20:00:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2911. [2021-12-18 20:00:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 1.0841924398625429) internal successors, (3155), 2910 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 3155 transitions. [2021-12-18 20:00:32,041 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 3155 transitions. Word has length 173 [2021-12-18 20:00:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 2911 states and 3155 transitions. [2021-12-18 20:00:32,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.240384615384615) internal successors, (441), 104 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 3155 transitions. [2021-12-18 20:00:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-18 20:00:32,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:32,044 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:32,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:32,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:32,255 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1847494958, now seen corresponding path program 2 times [2021-12-18 20:00:32,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:32,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427503100] [2021-12-18 20:00:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:32,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 154 proven. 773 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-18 20:00:32,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:32,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427503100] [2021-12-18 20:00:32,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427503100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53483139] [2021-12-18 20:00:32,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:00:32,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:32,742 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:32,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-18 20:00:32,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:00:32,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:32,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-18 20:00:32,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:32,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:00:33,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:00:33,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:00:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:00:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 154 proven. 773 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-18 20:00:33,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:34,036 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2189 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2189) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-12-18 20:00:34,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:34,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:00:34,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:34,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:00:34,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:00:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 154 proven. 773 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-18 20:00:34,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53483139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:34,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:34,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2021-12-18 20:00:34,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680312145] [2021-12-18 20:00:34,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:34,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 20:00:34,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 20:00:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2034, Unknown=1, NotChecked=90, Total=2256 [2021-12-18 20:00:34,367 INFO L87 Difference]: Start difference. First operand 2911 states and 3155 transitions. Second operand has 48 states, 48 states have (on average 4.1875) internal successors, (201), 48 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:35,682 INFO L93 Difference]: Finished difference Result 2837 states and 3066 transitions. [2021-12-18 20:00:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 20:00:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.1875) internal successors, (201), 48 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-12-18 20:00:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:35,685 INFO L225 Difference]: With dead ends: 2837 [2021-12-18 20:00:35,685 INFO L226 Difference]: Without dead ends: 2161 [2021-12-18 20:00:35,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 325 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=326, Invalid=4933, Unknown=1, NotChecked=142, Total=5402 [2021-12-18 20:00:35,685 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 236 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:35,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 2125 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1775 Invalid, 0 Unknown, 132 Unchecked, 0.6s Time] [2021-12-18 20:00:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-12-18 20:00:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2161. [2021-12-18 20:00:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 1.0814814814814815) internal successors, (2336), 2160 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 2336 transitions. [2021-12-18 20:00:35,701 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 2336 transitions. Word has length 174 [2021-12-18 20:00:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:35,701 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 2336 transitions. [2021-12-18 20:00:35,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.1875) internal successors, (201), 48 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 2336 transitions. [2021-12-18 20:00:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-18 20:00:35,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:35,703 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:35,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:35,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-18 20:00:35,904 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash 333835029, now seen corresponding path program 26 times [2021-12-18 20:00:35,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757562115] [2021-12-18 20:00:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:35,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 288 proven. 740 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:36,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:36,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757562115] [2021-12-18 20:00:36,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757562115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:36,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028818647] [2021-12-18 20:00:36,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:00:36,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:36,420 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:36,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-18 20:00:36,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:00:36,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-18 20:00:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:00:36,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:00:36,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:00:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 325 proven. 703 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:38,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 378 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:40,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028818647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:40,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:40,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2021-12-18 20:00:40,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460685848] [2021-12-18 20:00:40,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:40,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-18 20:00:40,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-18 20:00:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=8098, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 20:00:40,543 INFO L87 Difference]: Start difference. First operand 2161 states and 2336 transitions. Second operand has 95 states, 94 states have (on average 5.5638297872340425) internal successors, (523), 95 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:43,331 INFO L93 Difference]: Finished difference Result 3290 states and 3563 transitions. [2021-12-18 20:00:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 20:00:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 5.5638297872340425) internal successors, (523), 95 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-18 20:00:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:43,335 INFO L225 Difference]: With dead ends: 3290 [2021-12-18 20:00:43,336 INFO L226 Difference]: Without dead ends: 3290 [2021-12-18 20:00:43,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4046 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3554, Invalid=16468, Unknown=0, NotChecked=0, Total=20022 [2021-12-18 20:00:43,337 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 763 mSDsluCounter, 3083 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 3220 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:43,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 3220 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 20:00:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-12-18 20:00:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2253. [2021-12-18 20:00:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 1.0821492007104796) internal successors, (2437), 2252 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 2437 transitions. [2021-12-18 20:00:43,358 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 2437 transitions. Word has length 177 [2021-12-18 20:00:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:43,358 INFO L470 AbstractCegarLoop]: Abstraction has 2253 states and 2437 transitions. [2021-12-18 20:00:43,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 5.5638297872340425) internal successors, (523), 95 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 2437 transitions. [2021-12-18 20:00:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-18 20:00:43,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:43,363 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:43,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:43,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:43,575 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 706133599, now seen corresponding path program 27 times [2021-12-18 20:00:43,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620838729] [2021-12-18 20:00:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:43,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 80 proven. 1054 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:44,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:44,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620838729] [2021-12-18 20:00:44,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620838729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:44,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508290750] [2021-12-18 20:00:44,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:00:44,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:44,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:44,369 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:44,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-18 20:00:44,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-18 20:00:44,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 185 conjunts are in the unsatisfiable core [2021-12-18 20:00:44,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:45,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:00:45,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:00:46,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:00:46,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:00:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 20:00:48,578 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:00:48,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 16 [2021-12-18 20:00:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:00:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:00:50,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:00:50,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 14 [2021-12-18 20:00:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 80 proven. 1054 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:51,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:00:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 99 [2021-12-18 20:00:55,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:00:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 132 proven. 1002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:55,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508290750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:55,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:55,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 42, 41] total 105 [2021-12-18 20:00:55,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075265449] [2021-12-18 20:00:55,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:55,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-18 20:00:55,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:55,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-18 20:00:55,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=10491, Unknown=0, NotChecked=0, Total=10920 [2021-12-18 20:00:55,044 INFO L87 Difference]: Start difference. First operand 2253 states and 2437 transitions. Second operand has 105 states, 105 states have (on average 4.552380952380952) internal successors, (478), 105 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:01,821 INFO L93 Difference]: Finished difference Result 3582 states and 3858 transitions. [2021-12-18 20:01:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-18 20:01:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 4.552380952380952) internal successors, (478), 105 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-12-18 20:01:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:01,824 INFO L225 Difference]: With dead ends: 3582 [2021-12-18 20:01:01,824 INFO L226 Difference]: Without dead ends: 2270 [2021-12-18 20:01:01,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6631 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1212, Invalid=28200, Unknown=0, NotChecked=0, Total=29412 [2021-12-18 20:01:01,825 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 671 mSDsluCounter, 7589 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 7718 SdHoareTripleChecker+Invalid, 4302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 993 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:01,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 7718 Invalid, 4302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3173 Invalid, 0 Unknown, 993 Unchecked, 1.4s Time] [2021-12-18 20:01:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-12-18 20:01:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2261. [2021-12-18 20:01:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 1.081858407079646) internal successors, (2445), 2260 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 2445 transitions. [2021-12-18 20:01:01,840 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 2445 transitions. Word has length 185 [2021-12-18 20:01:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:01,841 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 2445 transitions. [2021-12-18 20:01:01,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 4.552380952380952) internal successors, (478), 105 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 2445 transitions. [2021-12-18 20:01:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-18 20:01:01,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:01,843 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:01,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:02,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:02,059 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1842720994, now seen corresponding path program 28 times [2021-12-18 20:01:02,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:02,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531284240] [2021-12-18 20:01:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:02,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 338 proven. 853 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:02,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:02,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531284240] [2021-12-18 20:01:02,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531284240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:02,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428349260] [2021-12-18 20:01:02,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:01:02,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:02,613 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:02,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-18 20:01:02,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:01:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-18 20:01:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 392 proven. 799 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:03,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:04,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 20:01:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 392 proven. 799 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:04,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428349260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:04,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:04,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 70 [2021-12-18 20:01:04,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091037826] [2021-12-18 20:01:04,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:04,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-18 20:01:04,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-18 20:01:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=4368, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 20:01:04,771 INFO L87 Difference]: Start difference. First operand 2261 states and 2445 transitions. Second operand has 71 states, 70 states have (on average 5.557142857142857) internal successors, (389), 71 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:06,592 INFO L93 Difference]: Finished difference Result 3390 states and 3670 transitions. [2021-12-18 20:01:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 20:01:06,592 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 5.557142857142857) internal successors, (389), 71 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-12-18 20:01:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:06,596 INFO L225 Difference]: With dead ends: 3390 [2021-12-18 20:01:06,596 INFO L226 Difference]: Without dead ends: 3390 [2021-12-18 20:01:06,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2114, Invalid=8806, Unknown=0, NotChecked=0, Total=10920 [2021-12-18 20:01:06,598 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 685 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:06,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 3316 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 20:01:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2021-12-18 20:01:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 2351. [2021-12-18 20:01:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 1.0817021276595744) internal successors, (2542), 2350 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 2542 transitions. [2021-12-18 20:01:06,644 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 2542 transitions. Word has length 189 [2021-12-18 20:01:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:06,644 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 2542 transitions. [2021-12-18 20:01:06,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 5.557142857142857) internal successors, (389), 71 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 2542 transitions. [2021-12-18 20:01:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-18 20:01:06,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:06,647 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:06,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:06,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 20:01:06,863 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash 7279144, now seen corresponding path program 3 times [2021-12-18 20:01:06,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:06,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815937935] [2021-12-18 20:01:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:06,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 173 proven. 982 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 20:01:07,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815937935] [2021-12-18 20:01:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815937935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890521531] [2021-12-18 20:01:07,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:01:07,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:07,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:07,388 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:07,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-18 20:01:07,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-18 20:01:07,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:07,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-18 20:01:07,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:07,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:01:08,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:01:08,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:01:08,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:01:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 173 proven. 982 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 20:01:08,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:08,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2508 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2508) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-18 20:01:08,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:08,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:01:08,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:08,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:01:08,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:01:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 173 proven. 982 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 20:01:09,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890521531] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:09,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:09,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 51 [2021-12-18 20:01:09,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183639264] [2021-12-18 20:01:09,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:09,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 20:01:09,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 20:01:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2315, Unknown=1, NotChecked=96, Total=2550 [2021-12-18 20:01:09,320 INFO L87 Difference]: Start difference. First operand 2351 states and 2542 transitions. Second operand has 51 states, 51 states have (on average 4.294117647058823) internal successors, (219), 51 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:10,789 INFO L93 Difference]: Finished difference Result 2313 states and 2497 transitions. [2021-12-18 20:01:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 20:01:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.294117647058823) internal successors, (219), 51 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-12-18 20:01:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:10,794 INFO L225 Difference]: With dead ends: 2313 [2021-12-18 20:01:10,794 INFO L226 Difference]: Without dead ends: 1555 [2021-12-18 20:01:10,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 367 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=5663, Unknown=1, NotChecked=152, Total=6162 [2021-12-18 20:01:10,795 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 346 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:10,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 2606 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2092 Invalid, 0 Unknown, 194 Unchecked, 0.7s Time] [2021-12-18 20:01:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-12-18 20:01:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2021-12-18 20:01:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 1.0797940797940797) internal successors, (1678), 1554 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 1678 transitions. [2021-12-18 20:01:10,823 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 1678 transitions. Word has length 191 [2021-12-18 20:01:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:10,823 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 1678 transitions. [2021-12-18 20:01:10,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.294117647058823) internal successors, (219), 51 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 1678 transitions. [2021-12-18 20:01:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-18 20:01:10,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:10,825 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:10,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:11,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-18 20:01:11,028 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1992399060, now seen corresponding path program 29 times [2021-12-18 20:01:11,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:11,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405428134] [2021-12-18 20:01:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:11,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 86 proven. 1219 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:11,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:11,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405428134] [2021-12-18 20:01:11,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405428134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:11,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554085723] [2021-12-18 20:01:11,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:01:11,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:11,899 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:11,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-18 20:01:12,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-18 20:01:12,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:12,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 175 conjunts are in the unsatisfiable core [2021-12-18 20:01:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:12,361 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:12,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:01:13,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:01:13,495 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:13,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:01:13,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-18 20:01:16,350 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:01:16,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 20:01:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:01:17,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:17,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:01:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 86 proven. 1219 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:17,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:18,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:18,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:01:18,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:01:18,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:01:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 86 proven. 1219 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:21,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554085723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:21,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:21,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 107 [2021-12-18 20:01:21,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522068972] [2021-12-18 20:01:21,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:21,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-18 20:01:21,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-18 20:01:21,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=11063, Unknown=0, NotChecked=0, Total=11342 [2021-12-18 20:01:21,186 INFO L87 Difference]: Start difference. First operand 1555 states and 1678 transitions. Second operand has 107 states, 107 states have (on average 4.719626168224299) internal successors, (505), 107 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:29,906 INFO L93 Difference]: Finished difference Result 4133 states and 4445 transitions. [2021-12-18 20:01:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-18 20:01:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.719626168224299) internal successors, (505), 107 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-18 20:01:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:29,909 INFO L225 Difference]: With dead ends: 4133 [2021-12-18 20:01:29,910 INFO L226 Difference]: Without dead ends: 2721 [2021-12-18 20:01:29,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 335 SyntacticMatches, 37 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6717 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1103, Invalid=33307, Unknown=0, NotChecked=0, Total=34410 [2021-12-18 20:01:29,912 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 1004 mSDsluCounter, 9164 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 9302 SdHoareTripleChecker+Invalid, 8301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4349 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:29,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 9302 Invalid, 8301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3817 Invalid, 0 Unknown, 4349 Unchecked, 1.4s Time] [2021-12-18 20:01:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-12-18 20:01:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1563. [2021-12-18 20:01:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 1.0793854033290653) internal successors, (1686), 1562 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 1686 transitions. [2021-12-18 20:01:29,925 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 1686 transitions. Word has length 197 [2021-12-18 20:01:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:29,926 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 1686 transitions. [2021-12-18 20:01:29,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.719626168224299) internal successors, (505), 107 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 1686 transitions. [2021-12-18 20:01:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 20:01:29,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:29,928 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:29,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:30,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-18 20:01:30,144 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash 154053935, now seen corresponding path program 30 times [2021-12-18 20:01:30,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850324634] [2021-12-18 20:01:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:30,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 392 proven. 974 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:30,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850324634] [2021-12-18 20:01:30,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850324634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976244536] [2021-12-18 20:01:30,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:01:30,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:30,810 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:30,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-18 20:01:32,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-18 20:01:32,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-18 20:01:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:32,211 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:32,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:01:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 450 proven. 916 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 450 proven. 916 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:35,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976244536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:35,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:35,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2021-12-18 20:01:35,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460476385] [2021-12-18 20:01:35,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:35,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-18 20:01:35,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-18 20:01:35,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1624, Invalid=9718, Unknown=0, NotChecked=0, Total=11342 [2021-12-18 20:01:35,608 INFO L87 Difference]: Start difference. First operand 1563 states and 1686 transitions. Second operand has 107 states, 106 states have (on average 5.613207547169812) internal successors, (595), 107 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:37,387 INFO L93 Difference]: Finished difference Result 2691 states and 2911 transitions. [2021-12-18 20:01:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 20:01:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 5.613207547169812) internal successors, (595), 107 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-12-18 20:01:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:37,391 INFO L225 Difference]: With dead ends: 2691 [2021-12-18 20:01:37,391 INFO L226 Difference]: Without dead ends: 2691 [2021-12-18 20:01:37,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5408 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4139, Invalid=15883, Unknown=0, NotChecked=0, Total=20022 [2021-12-18 20:01:37,393 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1356 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:37,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 2615 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1935 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2021-12-18 20:01:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-12-18 20:01:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 1653. [2021-12-18 20:01:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 1.0792978208232447) internal successors, (1783), 1652 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 1783 transitions. [2021-12-18 20:01:37,430 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 1783 transitions. Word has length 201 [2021-12-18 20:01:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:37,430 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 1783 transitions. [2021-12-18 20:01:37,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 5.613207547169812) internal successors, (595), 107 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 1783 transitions. [2021-12-18 20:01:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-18 20:01:37,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:37,432 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:37,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:37,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:37,651 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1114687097, now seen corresponding path program 31 times [2021-12-18 20:01:37,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516082427] [2021-12-18 20:01:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:37,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 92 proven. 1396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:39,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516082427] [2021-12-18 20:01:39,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516082427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708609820] [2021-12-18 20:01:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:01:39,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:39,004 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:39,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-18 20:01:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 187 conjunts are in the unsatisfiable core [2021-12-18 20:01:39,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:39,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:01:40,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:01:40,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:01:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:01:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 92 proven. 1396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:40,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:41,134 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2774 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2774) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 15)) 0)) is different from false [2021-12-18 20:01:41,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:01:41,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:01:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:01:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 92 proven. 1396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:41,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708609820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:41,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:41,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 42, 42] total 75 [2021-12-18 20:01:41,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476765886] [2021-12-18 20:01:41,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:41,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-18 20:01:41,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-18 20:01:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=5234, Unknown=1, NotChecked=144, Total=5550 [2021-12-18 20:01:41,635 INFO L87 Difference]: Start difference. First operand 1653 states and 1783 transitions. Second operand has 75 states, 75 states have (on average 4.013333333333334) internal successors, (301), 75 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:47,093 INFO L93 Difference]: Finished difference Result 4076 states and 4403 transitions. [2021-12-18 20:01:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-18 20:01:47,094 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.013333333333334) internal successors, (301), 75 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-12-18 20:01:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:47,096 INFO L225 Difference]: With dead ends: 4076 [2021-12-18 20:01:47,096 INFO L226 Difference]: Without dead ends: 2693 [2021-12-18 20:01:47,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 388 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=483, Invalid=16290, Unknown=1, NotChecked=256, Total=17030 [2021-12-18 20:01:47,097 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 250 mSDsluCounter, 9751 mSDsCounter, 0 mSdLazyCounter, 9056 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 9914 SdHoareTripleChecker+Invalid, 9457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 9056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:47,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 9914 Invalid, 9457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 9056 Invalid, 0 Unknown, 351 Unchecked, 3.0s Time] [2021-12-18 20:01:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-12-18 20:01:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 1661. [2021-12-18 20:01:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 1.0789156626506025) internal successors, (1791), 1660 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 1791 transitions. [2021-12-18 20:01:47,111 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 1791 transitions. Word has length 209 [2021-12-18 20:01:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:47,111 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 1791 transitions. [2021-12-18 20:01:47,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.013333333333334) internal successors, (301), 75 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 1791 transitions. [2021-12-18 20:01:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-18 20:01:47,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:47,113 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:47,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:47,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-18 20:01:47,316 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash -105832452, now seen corresponding path program 32 times [2021-12-18 20:01:47,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:47,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372507255] [2021-12-18 20:01:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:47,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 450 proven. 1103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:47,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372507255] [2021-12-18 20:01:47,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372507255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856676816] [2021-12-18 20:01:47,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:01:47,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:47,938 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:47,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-18 20:01:48,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:01:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-18 20:01:48,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 496 proven. 1057 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:49,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 20:01:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 496 proven. 1057 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:50,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856676816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:50,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:50,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2021-12-18 20:01:50,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110538803] [2021-12-18 20:01:50,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:50,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 20:01:50,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 20:01:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=5572, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 20:01:50,434 INFO L87 Difference]: Start difference. First operand 1661 states and 1791 transitions. Second operand has 80 states, 79 states have (on average 5.405063291139241) internal successors, (427), 80 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:52,652 INFO L93 Difference]: Finished difference Result 2789 states and 3016 transitions. [2021-12-18 20:01:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-18 20:01:52,653 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 5.405063291139241) internal successors, (427), 80 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-12-18 20:01:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:52,655 INFO L225 Difference]: With dead ends: 2789 [2021-12-18 20:01:52,655 INFO L226 Difference]: Without dead ends: 2789 [2021-12-18 20:01:52,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 381 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2687, Invalid=11119, Unknown=0, NotChecked=0, Total=13806 [2021-12-18 20:01:52,657 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1117 mSDsluCounter, 3798 mSDsCounter, 0 mSdLazyCounter, 3259 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 3957 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:52,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 3957 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3259 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 20:01:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-12-18 20:01:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 1751. [2021-12-18 20:01:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 1.078857142857143) internal successors, (1888), 1750 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 1888 transitions. [2021-12-18 20:01:52,682 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 1888 transitions. Word has length 213 [2021-12-18 20:01:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:52,682 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 1888 transitions. [2021-12-18 20:01:52,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 5.405063291139241) internal successors, (427), 80 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 1888 transitions. [2021-12-18 20:01:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-18 20:01:52,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:52,684 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:52,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:52,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:52,885 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash -986833850, now seen corresponding path program 33 times [2021-12-18 20:01:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:52,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966472018] [2021-12-18 20:01:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:52,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 98 proven. 1585 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:53,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:53,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966472018] [2021-12-18 20:01:53,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966472018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:53,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300367356] [2021-12-18 20:01:53,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:01:53,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:53,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:53,867 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:53,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-18 20:01:54,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-18 20:01:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 236 conjunts are in the unsatisfiable core [2021-12-18 20:01:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:54,639 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:54,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:01:55,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:01:55,976 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:55,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:01:55,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-18 20:01:58,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:58,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-12-18 20:02:02,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:02:02,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:02:02,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:02,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 15 [2021-12-18 20:02:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 34 proven. 1649 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:02,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:06,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:06,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2021-12-18 20:02:06,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:02:06,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:06,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 69 [2021-12-18 20:02:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:02:06,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:06,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2021-12-18 20:02:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 90 proven. 1593 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:11,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300367356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:02:11,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:02:11,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 54, 52] total 144 [2021-12-18 20:02:11,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743676788] [2021-12-18 20:02:11,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:02:11,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-18 20:02:11,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:02:11,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-18 20:02:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=20125, Unknown=0, NotChecked=0, Total=20592 [2021-12-18 20:02:11,745 INFO L87 Difference]: Start difference. First operand 1751 states and 1888 transitions. Second operand has 144 states, 144 states have (on average 4.520833333333333) internal successors, (651), 144 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:02:24,054 INFO L93 Difference]: Finished difference Result 3123 states and 3357 transitions. [2021-12-18 20:02:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-18 20:02:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 4.520833333333333) internal successors, (651), 144 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2021-12-18 20:02:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:02:24,056 INFO L225 Difference]: With dead ends: 3123 [2021-12-18 20:02:24,056 INFO L226 Difference]: Without dead ends: 2847 [2021-12-18 20:02:24,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6842 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=1273, Invalid=54659, Unknown=0, NotChecked=0, Total=55932 [2021-12-18 20:02:24,059 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 525 mSDsluCounter, 7877 mSDsCounter, 0 mSdLazyCounter, 9436 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 7983 SdHoareTripleChecker+Invalid, 11461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 9436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1896 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:02:24,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 7983 Invalid, 11461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 9436 Invalid, 0 Unknown, 1896 Unchecked, 3.6s Time] [2021-12-18 20:02:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-12-18 20:02:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1810. [2021-12-18 20:02:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.078496406854616) internal successors, (1951), 1809 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 1951 transitions. [2021-12-18 20:02:24,073 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 1951 transitions. Word has length 221 [2021-12-18 20:02:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:02:24,073 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 1951 transitions. [2021-12-18 20:02:24,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 4.520833333333333) internal successors, (651), 144 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 1951 transitions. [2021-12-18 20:02:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-18 20:02:24,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:02:24,076 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:02:24,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-18 20:02:24,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:24,291 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:02:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:02:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 918374729, now seen corresponding path program 34 times [2021-12-18 20:02:24,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:02:24,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995332295] [2021-12-18 20:02:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:02:24,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:02:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 512 proven. 1240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:24,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:24,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995332295] [2021-12-18 20:02:24,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995332295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:24,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017811078] [2021-12-18 20:02:24,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:02:24,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:24,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:24,958 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:02:24,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-18 20:02:25,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:02:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:02:25,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-18 20:02:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:02:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 578 proven. 1174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:27,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 20:02:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 578 proven. 1174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:27,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017811078] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:02:27,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:02:27,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 82 [2021-12-18 20:02:27,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45141573] [2021-12-18 20:02:27,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:02:27,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-18 20:02:27,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:02:27,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-18 20:02:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=5982, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 20:02:27,551 INFO L87 Difference]: Start difference. First operand 1810 states and 1951 transitions. Second operand has 83 states, 82 states have (on average 5.621951219512195) internal successors, (461), 83 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:02:29,976 INFO L93 Difference]: Finished difference Result 4294 states and 4652 transitions. [2021-12-18 20:02:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 20:02:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 5.621951219512195) internal successors, (461), 83 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-12-18 20:02:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:02:29,980 INFO L225 Difference]: With dead ends: 4294 [2021-12-18 20:02:29,980 INFO L226 Difference]: Without dead ends: 4294 [2021-12-18 20:02:29,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2908, Invalid=12098, Unknown=0, NotChecked=0, Total=15006 [2021-12-18 20:02:29,981 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 736 mSDsluCounter, 4580 mSDsCounter, 0 mSdLazyCounter, 3937 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 4754 SdHoareTripleChecker+Invalid, 3999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:02:29,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 4754 Invalid, 3999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3937 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-18 20:02:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-12-18 20:02:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 1902. [2021-12-18 20:02:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 1.0794318779589689) internal successors, (2052), 1901 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2052 transitions. [2021-12-18 20:02:30,001 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2052 transitions. Word has length 225 [2021-12-18 20:02:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:02:30,001 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 2052 transitions. [2021-12-18 20:02:30,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 5.621951219512195) internal successors, (461), 83 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2052 transitions. [2021-12-18 20:02:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-18 20:02:30,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:02:30,004 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:02:30,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-18 20:02:30,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:30,217 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:02:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:02:30,217 INFO L85 PathProgramCache]: Analyzing trace with hash -996759405, now seen corresponding path program 35 times [2021-12-18 20:02:30,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:02:30,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087506559] [2021-12-18 20:02:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:02:30,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:02:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 104 proven. 1786 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:31,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:31,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087506559] [2021-12-18 20:02:31,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087506559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:31,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144964844] [2021-12-18 20:02:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:02:31,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:31,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:31,787 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:02:31,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-18 20:02:32,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-18 20:02:32,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:02:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 217 conjunts are in the unsatisfiable core [2021-12-18 20:02:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:02:32,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:02:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:02:33,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:02:36,275 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:02:36,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:02:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 104 proven. 1786 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:36,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:36,665 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3152 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3152) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 17)) 0)) is different from false [2021-12-18 20:02:36,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:36,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:02:36,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:02:36,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:02:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 104 proven. 1786 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144964844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:02:37,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:02:37,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 46, 46] total 99 [2021-12-18 20:02:37,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762154757] [2021-12-18 20:02:37,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:02:37,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-18 20:02:37,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:02:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-18 20:02:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9268, Unknown=1, NotChecked=192, Total=9702 [2021-12-18 20:02:37,297 INFO L87 Difference]: Start difference. First operand 1902 states and 2052 transitions. Second operand has 99 states, 99 states have (on average 4.747474747474747) internal successors, (470), 99 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:41,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:02:41,410 INFO L93 Difference]: Finished difference Result 4567 states and 4938 transitions. [2021-12-18 20:02:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 20:02:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.747474747474747) internal successors, (470), 99 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-12-18 20:02:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:02:41,414 INFO L225 Difference]: With dead ends: 4567 [2021-12-18 20:02:41,414 INFO L226 Difference]: Without dead ends: 4418 [2021-12-18 20:02:41,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2903 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=532, Invalid=20641, Unknown=1, NotChecked=288, Total=21462 [2021-12-18 20:02:41,415 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 267 mSDsluCounter, 10117 mSDsCounter, 0 mSdLazyCounter, 5297 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 10251 SdHoareTripleChecker+Invalid, 9825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4477 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:02:41,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 10251 Invalid, 9825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5297 Invalid, 0 Unknown, 4477 Unchecked, 1.7s Time] [2021-12-18 20:02:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2021-12-18 20:02:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 1961. [2021-12-18 20:02:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.0790816326530612) internal successors, (2115), 1960 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2115 transitions. [2021-12-18 20:02:41,437 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2115 transitions. Word has length 233 [2021-12-18 20:02:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:02:41,437 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 2115 transitions. [2021-12-18 20:02:41,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.747474747474747) internal successors, (470), 99 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2115 transitions. [2021-12-18 20:02:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-18 20:02:41,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:02:41,439 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:02:41,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-18 20:02:41,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:41,640 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:02:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:02:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash 726886678, now seen corresponding path program 36 times [2021-12-18 20:02:41,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:02:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200958367] [2021-12-18 20:02:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:02:41,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:02:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 578 proven. 1385 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:42,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200958367] [2021-12-18 20:02:42,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200958367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560058189] [2021-12-18 20:02:42,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:02:42,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:42,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:42,406 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:02:42,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-18 20:02:44,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-12-18 20:02:44,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:02:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-18 20:02:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:02:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:02:44,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:02:44,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:02:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 648 proven. 1315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:47,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 703 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:02:50,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560058189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:02:50,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:02:50,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 125 [2021-12-18 20:02:50,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823827887] [2021-12-18 20:02:50,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:02:50,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-18 20:02:50,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:02:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-18 20:02:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2056, Invalid=13694, Unknown=0, NotChecked=0, Total=15750 [2021-12-18 20:02:50,817 INFO L87 Difference]: Start difference. First operand 1961 states and 2115 transitions. Second operand has 126 states, 125 states have (on average 5.616) internal successors, (702), 126 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:02:53,993 INFO L93 Difference]: Finished difference Result 5879 states and 6375 transitions. [2021-12-18 20:02:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-18 20:02:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 5.616) internal successors, (702), 126 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-12-18 20:02:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:02:53,997 INFO L225 Difference]: With dead ends: 5879 [2021-12-18 20:02:53,997 INFO L226 Difference]: Without dead ends: 5879 [2021-12-18 20:02:53,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6280 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5883, Invalid=23529, Unknown=0, NotChecked=0, Total=29412 [2021-12-18 20:02:53,999 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 955 mSDsluCounter, 3617 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3806 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:02:53,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 3806 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 20:02:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2021-12-18 20:02:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 2053. [2021-12-18 20:02:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 1.0799220272904484) internal successors, (2216), 2052 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2216 transitions. [2021-12-18 20:02:54,020 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2216 transitions. Word has length 237 [2021-12-18 20:02:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:02:54,021 INFO L470 AbstractCegarLoop]: Abstraction has 2053 states and 2216 transitions. [2021-12-18 20:02:54,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 5.616) internal successors, (702), 126 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2216 transitions. [2021-12-18 20:02:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-18 20:02:54,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:02:54,023 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:02:54,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-18 20:02:54,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-18 20:02:54,227 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:02:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:02:54,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1962371834, now seen corresponding path program 4 times [2021-12-18 20:02:54,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:02:54,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649116482] [2021-12-18 20:02:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:02:54,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:02:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 230 proven. 1759 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-18 20:02:54,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649116482] [2021-12-18 20:02:54,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649116482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508993632] [2021-12-18 20:02:54,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:02:54,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:54,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:54,911 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:02:54,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-18 20:02:55,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:02:55,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:02:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 172 conjunts are in the unsatisfiable core [2021-12-18 20:02:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:02:55,208 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:02:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:02:56,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:56,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2021-12-18 20:02:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:02:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 20:02:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:02:58,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:58,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-12-18 20:02:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 230 proven. 1765 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 20:02:58,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:58,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3336 (Array Int Int)) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_892| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3336) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_892| 12)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_892|) (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_892| 0))) is different from false [2021-12-18 20:02:58,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:58,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:02:58,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:02:58,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:03:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 230 proven. 1765 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 20:03:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508993632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:01,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:01,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 41, 41] total 95 [2021-12-18 20:03:01,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169469546] [2021-12-18 20:03:01,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:01,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-18 20:03:01,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-18 20:03:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=8369, Unknown=1, NotChecked=184, Total=8930 [2021-12-18 20:03:01,606 INFO L87 Difference]: Start difference. First operand 2053 states and 2216 transitions. Second operand has 95 states, 95 states have (on average 4.8) internal successors, (456), 95 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:07,222 INFO L93 Difference]: Finished difference Result 3151 states and 3389 transitions. [2021-12-18 20:03:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 20:03:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 4.8) internal successors, (456), 95 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-12-18 20:03:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:07,224 INFO L225 Difference]: With dead ends: 3151 [2021-12-18 20:03:07,224 INFO L226 Difference]: Without dead ends: 2000 [2021-12-18 20:03:07,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 424 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2032, Invalid=23731, Unknown=1, NotChecked=318, Total=26082 [2021-12-18 20:03:07,226 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1949 mSDsluCounter, 5863 mSDsCounter, 0 mSdLazyCounter, 5418 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1949 SdHoareTripleChecker+Valid, 5969 SdHoareTripleChecker+Invalid, 6025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:07,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1949 Valid, 5969 Invalid, 6025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 5418 Invalid, 0 Unknown, 342 Unchecked, 2.0s Time] [2021-12-18 20:03:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-12-18 20:03:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 2000. [2021-12-18 20:03:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 1.0790395197598799) internal successors, (2157), 1999 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2157 transitions. [2021-12-18 20:03:07,237 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2157 transitions. Word has length 242 [2021-12-18 20:03:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:07,238 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 2157 transitions. [2021-12-18 20:03:07,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 4.8) internal successors, (456), 95 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2157 transitions. [2021-12-18 20:03:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-18 20:03:07,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:07,240 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:07,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:07,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-18 20:03:07,470 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash -949310624, now seen corresponding path program 37 times [2021-12-18 20:03:07,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:07,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331333942] [2021-12-18 20:03:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:07,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2110 backedges. 110 proven. 1999 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:08,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331333942] [2021-12-18 20:03:08,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331333942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226666253] [2021-12-18 20:03:08,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:03:08,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:08,640 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:03:08,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-18 20:03:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:08,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 228 conjunts are in the unsatisfiable core [2021-12-18 20:03:08,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:10,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:03:10,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:03:10,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-18 20:03:14,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:03:14,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:03:14,083 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 20:03:14,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2021-12-18 20:03:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2110 backedges. 110 proven. 1999 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:14,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:03:14,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:14,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 91 [2021-12-18 20:03:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2110 backedges. 114 proven. 1995 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:17,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226666253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:17,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:17,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 52, 51] total 124 [2021-12-18 20:03:17,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357406518] [2021-12-18 20:03:17,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:17,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-18 20:03:17,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:17,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-18 20:03:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=14865, Unknown=0, NotChecked=0, Total=15252 [2021-12-18 20:03:17,070 INFO L87 Difference]: Start difference. First operand 2000 states and 2157 transitions. Second operand has 124 states, 124 states have (on average 4.596774193548387) internal successors, (570), 124 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:22,549 INFO L93 Difference]: Finished difference Result 6609 states and 7137 transitions. [2021-12-18 20:03:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-18 20:03:22,549 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 4.596774193548387) internal successors, (570), 124 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-12-18 20:03:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:22,553 INFO L225 Difference]: With dead ends: 6609 [2021-12-18 20:03:22,553 INFO L226 Difference]: Without dead ends: 4806 [2021-12-18 20:03:22,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7579 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=935, Invalid=35737, Unknown=0, NotChecked=0, Total=36672 [2021-12-18 20:03:22,555 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 414 mSDsluCounter, 13340 mSDsCounter, 0 mSdLazyCounter, 5931 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 13524 SdHoareTripleChecker+Invalid, 9226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3224 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:22,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 13524 Invalid, 9226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5931 Invalid, 0 Unknown, 3224 Unchecked, 2.0s Time] [2021-12-18 20:03:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4806 states. [2021-12-18 20:03:22,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4806 to 2008. [2021-12-18 20:03:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 1.0787244643746885) internal successors, (2165), 2007 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 2165 transitions. [2021-12-18 20:03:22,572 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 2165 transitions. Word has length 245 [2021-12-18 20:03:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:22,572 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 2165 transitions. [2021-12-18 20:03:22,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 4.596774193548387) internal successors, (570), 124 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 2165 transitions. [2021-12-18 20:03:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-18 20:03:22,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:22,574 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:22,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:22,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-18 20:03:22,775 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1175699299, now seen corresponding path program 38 times [2021-12-18 20:03:22,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817784876] [2021-12-18 20:03:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:22,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 648 proven. 1538 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:23,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:23,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817784876] [2021-12-18 20:03:23,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817784876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:23,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134276248] [2021-12-18 20:03:23,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:03:23,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:23,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:23,555 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:03:23,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-18 20:03:23,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:03:23,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:23,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 198 conjunts are in the unsatisfiable core [2021-12-18 20:03:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:03:23,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:03:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:03:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 703 proven. 1483 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:26,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 780 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:29,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134276248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:29,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:29,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2021-12-18 20:03:29,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843060714] [2021-12-18 20:03:29,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:29,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-18 20:03:29,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-18 20:03:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1534, Invalid=15496, Unknown=0, NotChecked=0, Total=17030 [2021-12-18 20:03:29,964 INFO L87 Difference]: Start difference. First operand 2008 states and 2165 transitions. Second operand has 131 states, 130 states have (on average 5.684615384615385) internal successors, (739), 131 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:34,859 INFO L93 Difference]: Finished difference Result 4898 states and 5305 transitions. [2021-12-18 20:03:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 20:03:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 5.684615384615385) internal successors, (739), 131 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-12-18 20:03:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:34,864 INFO L225 Difference]: With dead ends: 4898 [2021-12-18 20:03:34,864 INFO L226 Difference]: Without dead ends: 4898 [2021-12-18 20:03:34,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8070 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6865, Invalid=31747, Unknown=0, NotChecked=0, Total=38612 [2021-12-18 20:03:34,866 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 1214 mSDsluCounter, 6353 mSDsCounter, 0 mSdLazyCounter, 5259 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 5369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 5259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:34,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 6544 Invalid, 5369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 5259 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 20:03:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-12-18 20:03:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2098. [2021-12-18 20:03:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 1.0786838340486409) internal successors, (2262), 2097 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2262 transitions. [2021-12-18 20:03:34,897 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2262 transitions. Word has length 249 [2021-12-18 20:03:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2262 transitions. [2021-12-18 20:03:34,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 5.684615384615385) internal successors, (739), 131 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2262 transitions. [2021-12-18 20:03:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-18 20:03:34,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:34,899 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:34,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:35,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:35,107 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1207278419, now seen corresponding path program 39 times [2021-12-18 20:03:35,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216944050] [2021-12-18 20:03:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:35,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2341 backedges. 116 proven. 2224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:36,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216944050] [2021-12-18 20:03:36,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216944050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651750027] [2021-12-18 20:03:36,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:03:36,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:36,292 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:03:36,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-18 20:03:37,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-12-18 20:03:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 246 conjunts are in the unsatisfiable core [2021-12-18 20:03:37,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:37,456 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:03:37,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:03:39,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:03:39,330 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-12-18 20:03:39,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-18 20:03:42,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:03:42,842 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-18 20:03:42,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 10 [2021-12-18 20:03:42,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:42,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-12-18 20:03:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2341 backedges. 116 proven. 2224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:42,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:45,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-12-18 20:03:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2341 backedges. 116 proven. 2224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:49,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651750027] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:49,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:49,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 50] total 145 [2021-12-18 20:03:49,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862848555] [2021-12-18 20:03:49,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:49,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-18 20:03:49,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-18 20:03:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=20435, Unknown=0, NotChecked=0, Total=20880 [2021-12-18 20:03:49,244 INFO L87 Difference]: Start difference. First operand 2098 states and 2262 transitions. Second operand has 145 states, 145 states have (on average 5.172413793103448) internal successors, (750), 145 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:57,061 INFO L93 Difference]: Finished difference Result 6807 states and 7348 transitions. [2021-12-18 20:03:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-18 20:03:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 5.172413793103448) internal successors, (750), 145 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-12-18 20:03:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:57,064 INFO L225 Difference]: With dead ends: 6807 [2021-12-18 20:03:57,064 INFO L226 Difference]: Without dead ends: 4905 [2021-12-18 20:03:57,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 419 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9765 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1039, Invalid=46703, Unknown=0, NotChecked=0, Total=47742 [2021-12-18 20:03:57,066 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 389 mSDsluCounter, 15282 mSDsCounter, 0 mSdLazyCounter, 7548 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 15457 SdHoareTripleChecker+Invalid, 10771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 7548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3142 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:57,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 15457 Invalid, 10771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 7548 Invalid, 0 Unknown, 3142 Unchecked, 2.7s Time] [2021-12-18 20:03:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4905 states. [2021-12-18 20:03:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4905 to 2106. [2021-12-18 20:03:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 1.0783847980997625) internal successors, (2270), 2105 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2270 transitions. [2021-12-18 20:03:57,086 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2270 transitions. Word has length 257 [2021-12-18 20:03:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:57,086 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 2270 transitions. [2021-12-18 20:03:57,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 5.172413793103448) internal successors, (750), 145 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2270 transitions. [2021-12-18 20:03:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-18 20:03:57,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:57,088 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:57,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:57,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:57,292 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:57,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1992389584, now seen corresponding path program 40 times [2021-12-18 20:03:57,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:57,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683109003] [2021-12-18 20:03:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:57,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2422 backedges. 722 proven. 1699 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:58,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:58,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683109003] [2021-12-18 20:03:58,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683109003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518073975] [2021-12-18 20:03:58,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:03:58,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:58,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:58,170 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:03:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-18 20:03:58,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:03:58,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 195 conjunts are in the unsatisfiable core [2021-12-18 20:03:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2422 backedges. 800 proven. 1621 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:59,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:01,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 20:04:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2422 backedges. 800 proven. 1621 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:01,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518073975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:01,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:01,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 94 [2021-12-18 20:04:01,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155243375] [2021-12-18 20:04:01,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:01,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-18 20:04:01,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-18 20:04:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1082, Invalid=7848, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 20:04:01,289 INFO L87 Difference]: Start difference. First operand 2106 states and 2270 transitions. Second operand has 95 states, 94 states have (on average 5.670212765957447) internal successors, (533), 95 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:04,047 INFO L93 Difference]: Finished difference Result 4998 states and 5412 transitions. [2021-12-18 20:04:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-18 20:04:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 5.670212765957447) internal successors, (533), 95 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2021-12-18 20:04:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:04,051 INFO L225 Difference]: With dead ends: 4998 [2021-12-18 20:04:04,051 INFO L226 Difference]: Without dead ends: 4998 [2021-12-18 20:04:04,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4196 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3824, Invalid=15916, Unknown=0, NotChecked=0, Total=19740 [2021-12-18 20:04:04,053 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 1071 mSDsluCounter, 4955 mSDsCounter, 0 mSdLazyCounter, 4192 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 5163 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:04,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 5163 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4192 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-18 20:04:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2021-12-18 20:04:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 2196. [2021-12-18 20:04:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 1.078359908883827) internal successors, (2367), 2195 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2367 transitions. [2021-12-18 20:04:04,070 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2367 transitions. Word has length 261 [2021-12-18 20:04:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:04,071 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 2367 transitions. [2021-12-18 20:04:04,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 5.670212765957447) internal successors, (533), 95 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:04,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2367 transitions. [2021-12-18 20:04:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-18 20:04:04,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:04,074 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:04,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:04,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:04,291 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1953895546, now seen corresponding path program 41 times [2021-12-18 20:04:04,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:04,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742478543] [2021-12-18 20:04:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:04,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 122 proven. 2461 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:05,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742478543] [2021-12-18 20:04:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742478543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787776632] [2021-12-18 20:04:05,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:04:05,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:05,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:05,571 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:05,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-18 20:04:06,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-18 20:04:06,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:06,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 241 conjunts are in the unsatisfiable core [2021-12-18 20:04:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:06,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:04:06,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:04:06,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 20:04:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:04:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 122 proven. 2461 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:08,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:08,828 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3869 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3869) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 20)) 0)) is different from false [2021-12-18 20:04:08,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:08,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:04:08,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:08,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:04:08,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:04:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 122 proven. 2461 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:10,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787776632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:10,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:10,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 104 [2021-12-18 20:04:10,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862183530] [2021-12-18 20:04:10,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:10,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 20:04:10,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 20:04:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=10233, Unknown=1, NotChecked=202, Total=10712 [2021-12-18 20:04:10,532 INFO L87 Difference]: Start difference. First operand 2196 states and 2367 transitions. Second operand has 104 states, 104 states have (on average 5.153846153846154) internal successors, (536), 104 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:15,939 INFO L93 Difference]: Finished difference Result 6833 states and 7389 transitions. [2021-12-18 20:04:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-18 20:04:15,939 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 5.153846153846154) internal successors, (536), 104 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-12-18 20:04:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:15,942 INFO L225 Difference]: With dead ends: 6833 [2021-12-18 20:04:15,942 INFO L226 Difference]: Without dead ends: 5000 [2021-12-18 20:04:15,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 479 SyntacticMatches, 8 SemanticMatches, 151 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=611, Invalid=22344, Unknown=1, NotChecked=300, Total=23256 [2021-12-18 20:04:15,943 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 848 mSDsluCounter, 13909 mSDsCounter, 0 mSdLazyCounter, 10532 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 14114 SdHoareTripleChecker+Invalid, 10915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 10532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:15,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 14114 Invalid, 10915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 10532 Invalid, 0 Unknown, 271 Unchecked, 3.3s Time] [2021-12-18 20:04:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-12-18 20:04:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 2204. [2021-12-18 20:04:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.0780753517930095) internal successors, (2375), 2203 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2375 transitions. [2021-12-18 20:04:15,959 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2375 transitions. Word has length 269 [2021-12-18 20:04:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:15,960 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 2375 transitions. [2021-12-18 20:04:15,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 5.153846153846154) internal successors, (536), 104 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2375 transitions. [2021-12-18 20:04:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-18 20:04:15,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:15,962 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:15,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:16,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-12-18 20:04:16,163 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash 448008061, now seen corresponding path program 42 times [2021-12-18 20:04:16,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467383215] [2021-12-18 20:04:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:16,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2669 backedges. 800 proven. 1868 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:17,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:17,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467383215] [2021-12-18 20:04:17,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467383215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:17,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550503905] [2021-12-18 20:04:17,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:04:17,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:17,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:17,078 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:17,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-18 20:04:20,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-12-18 20:04:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 171 conjunts are in the unsatisfiable core [2021-12-18 20:04:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2669 backedges. 924 proven. 1744 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:24,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 20:04:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2669 backedges. 840 proven. 1828 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:25,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550503905] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:25,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:25,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 51, 51] total 126 [2021-12-18 20:04:25,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646324747] [2021-12-18 20:04:25,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:25,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-18 20:04:25,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-18 20:04:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2056, Invalid=13946, Unknown=0, NotChecked=0, Total=16002 [2021-12-18 20:04:25,938 INFO L87 Difference]: Start difference. First operand 2204 states and 2375 transitions. Second operand has 127 states, 126 states have (on average 5.738095238095238) internal successors, (723), 127 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:31,725 INFO L93 Difference]: Finished difference Result 5096 states and 5517 transitions. [2021-12-18 20:04:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-18 20:04:31,726 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 5.738095238095238) internal successors, (723), 127 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-12-18 20:04:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:31,729 INFO L225 Difference]: With dead ends: 5096 [2021-12-18 20:04:31,729 INFO L226 Difference]: Without dead ends: 5096 [2021-12-18 20:04:31,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 466 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7767 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=7731, Invalid=31671, Unknown=0, NotChecked=0, Total=39402 [2021-12-18 20:04:31,731 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 1177 mSDsluCounter, 4713 mSDsCounter, 0 mSdLazyCounter, 3717 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 4929 SdHoareTripleChecker+Invalid, 3861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:31,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 4929 Invalid, 3861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3717 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-18 20:04:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2021-12-18 20:04:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 2294. [2021-12-18 20:04:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 1.0780636720453554) internal successors, (2472), 2293 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2472 transitions. [2021-12-18 20:04:31,754 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2472 transitions. Word has length 273 [2021-12-18 20:04:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:31,754 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 2472 transitions. [2021-12-18 20:04:31,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 5.738095238095238) internal successors, (723), 127 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2472 transitions. [2021-12-18 20:04:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-18 20:04:31,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:31,757 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:31,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:31,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:31,967 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1582168775, now seen corresponding path program 43 times [2021-12-18 20:04:31,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:31,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775692835] [2021-12-18 20:04:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:31,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 128 proven. 2710 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:33,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775692835] [2021-12-18 20:04:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775692835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138977609] [2021-12-18 20:04:33,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:04:33,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:33,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:33,385 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:33,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-18 20:04:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 247 conjunts are in the unsatisfiable core [2021-12-18 20:04:33,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:04:35,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:04:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:04:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:04:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 128 proven. 2710 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:35,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:36,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4095 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4095) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 21)) 0)) is different from false [2021-12-18 20:04:36,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:36,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:04:36,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:36,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:04:36,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:04:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 128 proven. 2710 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:36,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138977609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:36,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:36,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 87 [2021-12-18 20:04:36,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017996918] [2021-12-18 20:04:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:36,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-18 20:04:36,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-18 20:04:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=7091, Unknown=1, NotChecked=168, Total=7482 [2021-12-18 20:04:36,698 INFO L87 Difference]: Start difference. First operand 2294 states and 2472 transitions. Second operand has 87 states, 87 states have (on average 4.494252873563219) internal successors, (391), 87 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:41,312 INFO L93 Difference]: Finished difference Result 7021 states and 7591 transitions. [2021-12-18 20:04:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-18 20:04:41,312 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.494252873563219) internal successors, (391), 87 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2021-12-18 20:04:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:41,315 INFO L225 Difference]: With dead ends: 7021 [2021-12-18 20:04:41,315 INFO L226 Difference]: Without dead ends: 5098 [2021-12-18 20:04:41,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 526 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=423, Invalid=13152, Unknown=1, NotChecked=230, Total=13806 [2021-12-18 20:04:41,316 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 264 mSDsluCounter, 13387 mSDsCounter, 0 mSdLazyCounter, 9646 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 13600 SdHoareTripleChecker+Invalid, 9997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 9646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:41,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 13600 Invalid, 9997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 9646 Invalid, 0 Unknown, 322 Unchecked, 3.1s Time] [2021-12-18 20:04:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2021-12-18 20:04:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 2302. [2021-12-18 20:04:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 1.0777922642329423) internal successors, (2480), 2301 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 2480 transitions. [2021-12-18 20:04:41,332 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 2480 transitions. Word has length 281 [2021-12-18 20:04:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:41,332 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 2480 transitions. [2021-12-18 20:04:41,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.494252873563219) internal successors, (391), 87 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 2480 transitions. [2021-12-18 20:04:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-18 20:04:41,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:41,335 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:41,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:41,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-18 20:04:41,536 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:41,536 INFO L85 PathProgramCache]: Analyzing trace with hash -738948790, now seen corresponding path program 44 times [2021-12-18 20:04:41,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:41,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197319505] [2021-12-18 20:04:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:41,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2928 backedges. 882 proven. 2045 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:42,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:42,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197319505] [2021-12-18 20:04:42,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197319505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:42,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747841136] [2021-12-18 20:04:42,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:42,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:42,565 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:42,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-18 20:04:42,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:42,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 214 conjunts are in the unsatisfiable core [2021-12-18 20:04:42,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2928 backedges. 946 proven. 1981 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:44,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 20:04:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2928 backedges. 946 proven. 1981 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:46,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747841136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:46,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:46,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 103 [2021-12-18 20:04:46,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022191038] [2021-12-18 20:04:46,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:46,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 20:04:46,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 20:04:46,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1276, Invalid=9436, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 20:04:46,229 INFO L87 Difference]: Start difference. First operand 2302 states and 2480 transitions. Second operand has 104 states, 103 states have (on average 5.543689320388349) internal successors, (571), 104 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:49,756 INFO L93 Difference]: Finished difference Result 5194 states and 5622 transitions. [2021-12-18 20:04:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-18 20:04:49,757 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 5.543689320388349) internal successors, (571), 104 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-12-18 20:04:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:49,760 INFO L225 Difference]: With dead ends: 5194 [2021-12-18 20:04:49,760 INFO L226 Difference]: Without dead ends: 5194 [2021-12-18 20:04:49,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 514 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5205 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4644, Invalid=19226, Unknown=0, NotChecked=0, Total=23870 [2021-12-18 20:04:49,762 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1450 mSDsluCounter, 6336 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 5491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:49,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1450 Valid, 6560 Invalid, 5491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 20:04:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-12-18 20:04:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 2392. [2021-12-18 20:04:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 1.0777917189460477) internal successors, (2577), 2391 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 2577 transitions. [2021-12-18 20:04:49,780 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 2577 transitions. Word has length 285 [2021-12-18 20:04:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:49,780 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 2577 transitions. [2021-12-18 20:04:49,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 5.543689320388349) internal successors, (571), 104 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 2577 transitions. [2021-12-18 20:04:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-18 20:04:49,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:49,783 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:49,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:49,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-18 20:04:49,987 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:49,987 INFO L85 PathProgramCache]: Analyzing trace with hash -355313772, now seen corresponding path program 45 times [2021-12-18 20:04:49,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262316872] [2021-12-18 20:04:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:49,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3106 backedges. 134 proven. 2971 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:52,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:52,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262316872] [2021-12-18 20:04:52,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262316872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:52,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855397555] [2021-12-18 20:04:52,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:52,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:52,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:52,087 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:52,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-18 20:04:54,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-18 20:04:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:54,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 263 conjunts are in the unsatisfiable core [2021-12-18 20:04:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:54,892 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:54,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:57,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:04:57,409 INFO L354 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2021-12-18 20:04:57,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 20:05:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:05:03,451 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-18 20:05:03,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 10 [2021-12-18 20:05:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3106 backedges. 134 proven. 2971 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:03,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:06,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-12-18 20:05:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3106 backedges. 134 proven. 2971 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:11,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855397555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:11,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:11,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 57, 56] total 167 [2021-12-18 20:05:11,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127082117] [2021-12-18 20:05:11,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:11,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-12-18 20:05:11,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-12-18 20:05:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=27237, Unknown=0, NotChecked=0, Total=27722 [2021-12-18 20:05:11,548 INFO L87 Difference]: Start difference. First operand 2392 states and 2577 transitions. Second operand has 167 states, 167 states have (on average 5.125748502994012) internal successors, (856), 167 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:30,476 INFO L93 Difference]: Finished difference Result 6593 states and 7111 transitions. [2021-12-18 20:05:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-12-18 20:05:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 5.125748502994012) internal successors, (856), 167 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-12-18 20:05:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:30,480 INFO L225 Difference]: With dead ends: 6593 [2021-12-18 20:05:30,480 INFO L226 Difference]: Without dead ends: 6222 [2021-12-18 20:05:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 481 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19713 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1501, Invalid=87005, Unknown=0, NotChecked=0, Total=88506 [2021-12-18 20:05:30,483 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 535 mSDsluCounter, 22937 mSDsCounter, 0 mSdLazyCounter, 14427 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 23137 SdHoareTripleChecker+Invalid, 21622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 14427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7055 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:30,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 23137 Invalid, 21622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 14427 Invalid, 0 Unknown, 7055 Unchecked, 5.5s Time] [2021-12-18 20:05:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-12-18 20:05:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 2451. [2021-12-18 20:05:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2450 states have (on average 1.0775510204081633) internal successors, (2640), 2450 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 2640 transitions. [2021-12-18 20:05:30,504 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 2640 transitions. Word has length 293 [2021-12-18 20:05:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:30,504 INFO L470 AbstractCegarLoop]: Abstraction has 2451 states and 2640 transitions. [2021-12-18 20:05:30,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 5.125748502994012) internal successors, (856), 167 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 2640 transitions. [2021-12-18 20:05:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-18 20:05:30,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:30,511 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:30,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-18 20:05:30,715 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:05:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash -769640041, now seen corresponding path program 46 times [2021-12-18 20:05:30,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:30,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837040441] [2021-12-18 20:05:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:30,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3199 backedges. 968 proven. 2230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:31,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:31,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837040441] [2021-12-18 20:05:31,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837040441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:31,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481132289] [2021-12-18 20:05:31,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:05:31,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:31,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:31,812 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:31,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-18 20:05:32,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:05:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:32,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 222 conjunts are in the unsatisfiable core [2021-12-18 20:05:32,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3199 backedges. 1058 proven. 2140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:33,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 20:05:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3199 backedges. 1058 proven. 2140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:35,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481132289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:35,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:35,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 106 [2021-12-18 20:05:35,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061225258] [2021-12-18 20:05:35,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:35,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-18 20:05:35,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-18 20:05:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=9966, Unknown=0, NotChecked=0, Total=11342 [2021-12-18 20:05:35,571 INFO L87 Difference]: Start difference. First operand 2451 states and 2640 transitions. Second operand has 107 states, 106 states have (on average 5.7075471698113205) internal successors, (605), 107 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:39,408 INFO L93 Difference]: Finished difference Result 7191 states and 7792 transitions. [2021-12-18 20:05:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-18 20:05:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 5.7075471698113205) internal successors, (605), 107 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2021-12-18 20:05:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:39,413 INFO L225 Difference]: With dead ends: 7191 [2021-12-18 20:05:39,414 INFO L226 Difference]: Without dead ends: 7191 [2021-12-18 20:05:39,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5446 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4933, Invalid=20507, Unknown=0, NotChecked=0, Total=25440 [2021-12-18 20:05:39,415 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 1196 mSDsluCounter, 7271 mSDsCounter, 0 mSdLazyCounter, 6109 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 7510 SdHoareTripleChecker+Invalid, 6214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 6109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:39,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 7510 Invalid, 6214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 6109 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-18 20:05:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2021-12-18 20:05:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 2543. [2021-12-18 20:05:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2542 states have (on average 1.0782848151062157) internal successors, (2741), 2542 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 2741 transitions. [2021-12-18 20:05:39,436 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 2741 transitions. Word has length 297 [2021-12-18 20:05:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:39,437 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 2741 transitions. [2021-12-18 20:05:39,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 5.7075471698113205) internal successors, (605), 107 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 2741 transitions. [2021-12-18 20:05:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-18 20:05:39,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:39,440 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:39,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:39,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-18 20:05:39,641 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:05:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash 853764833, now seen corresponding path program 47 times [2021-12-18 20:05:39,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:39,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874071222] [2021-12-18 20:05:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:39,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 140 proven. 3244 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:41,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874071222] [2021-12-18 20:05:41,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874071222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580019342] [2021-12-18 20:05:41,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:05:41,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:41,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:41,228 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:41,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-18 20:05:42,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-12-18 20:05:42,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 279 conjunts are in the unsatisfiable core [2021-12-18 20:05:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:42,266 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:05:42,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:05:42,725 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:05:42,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 20:05:43,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:05:43,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 20:05:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:05:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 140 proven. 3244 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:45,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:46,407 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4570 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4570) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 23)) 0)) is different from false [2021-12-18 20:05:46,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:46,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:05:46,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:46,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:05:46,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:05:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 140 proven. 3244 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:48,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580019342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:48,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:48,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 60, 60] total 127 [2021-12-18 20:05:48,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480668924] [2021-12-18 20:05:48,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:48,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-18 20:05:48,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:48,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-18 20:05:48,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=15413, Unknown=1, NotChecked=248, Total=16002 [2021-12-18 20:05:48,982 INFO L87 Difference]: Start difference. First operand 2543 states and 2741 transitions. Second operand has 127 states, 127 states have (on average 5.0078740157480315) internal successors, (636), 127 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:02,801 INFO L93 Difference]: Finished difference Result 9685 states and 10448 transitions. [2021-12-18 20:06:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-18 20:06:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 5.0078740157480315) internal successors, (636), 127 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2021-12-18 20:06:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:02,807 INFO L225 Difference]: With dead ends: 9685 [2021-12-18 20:06:02,807 INFO L226 Difference]: Without dead ends: 7391 [2021-12-18 20:06:02,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 535 SyntacticMatches, 9 SemanticMatches, 262 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15516 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2085, Invalid=66824, Unknown=1, NotChecked=522, Total=69432 [2021-12-18 20:06:02,810 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 3588 mSDsluCounter, 18263 mSDsCounter, 0 mSdLazyCounter, 17630 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3588 SdHoareTripleChecker+Valid, 18481 SdHoareTripleChecker+Invalid, 18752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 17630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:02,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3588 Valid, 18481 Invalid, 18752 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [551 Valid, 17630 Invalid, 0 Unknown, 571 Unchecked, 5.8s Time] [2021-12-18 20:06:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-12-18 20:06:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 2551. [2021-12-18 20:06:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 1.0780392156862746) internal successors, (2749), 2550 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 2749 transitions. [2021-12-18 20:06:02,846 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 2749 transitions. Word has length 305 [2021-12-18 20:06:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:02,846 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 2749 transitions. [2021-12-18 20:06:02,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 5.0078740157480315) internal successors, (636), 127 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 2749 transitions. [2021-12-18 20:06:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-18 20:06:02,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:02,849 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:02,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:03,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:03,049 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash 100098148, now seen corresponding path program 48 times [2021-12-18 20:06:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683316991] [2021-12-18 20:06:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:03,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 1058 proven. 2423 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:04,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:04,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683316991] [2021-12-18 20:06:04,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683316991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:04,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398268128] [2021-12-18 20:06:04,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:06:04,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:04,190 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:04,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-18 20:06:12,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-12-18 20:06:12,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:12,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 197 conjunts are in the unsatisfiable core [2021-12-18 20:06:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:06:12,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:06:12,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:06:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 1152 proven. 2329 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:16,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 1225 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:21,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398268128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:21,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:21,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 161 [2021-12-18 20:06:21,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720856988] [2021-12-18 20:06:21,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:21,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-12-18 20:06:21,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:21,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-12-18 20:06:21,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3512, Invalid=22570, Unknown=0, NotChecked=0, Total=26082 [2021-12-18 20:06:21,380 INFO L87 Difference]: Start difference. First operand 2551 states and 2749 transitions. Second operand has 162 states, 161 states have (on average 5.701863354037267) internal successors, (918), 162 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:26,133 INFO L93 Difference]: Finished difference Result 7287 states and 7895 transitions. [2021-12-18 20:06:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-18 20:06:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 5.701863354037267) internal successors, (918), 162 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2021-12-18 20:06:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:26,139 INFO L225 Difference]: With dead ends: 7287 [2021-12-18 20:06:26,139 INFO L226 Difference]: Without dead ends: 7287 [2021-12-18 20:06:26,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10701 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=9852, Invalid=38768, Unknown=0, NotChecked=0, Total=48620 [2021-12-18 20:06:26,141 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 1278 mSDsluCounter, 5327 mSDsCounter, 0 mSdLazyCounter, 4492 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 5571 SdHoareTripleChecker+Invalid, 4631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:26,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 5571 Invalid, 4631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4492 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-18 20:06:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-12-18 20:06:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 2641. [2021-12-18 20:06:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2640 states have (on average 1.0780303030303031) internal successors, (2846), 2640 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:26,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 2846 transitions. [2021-12-18 20:06:26,168 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 2846 transitions. Word has length 309 [2021-12-18 20:06:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:26,168 INFO L470 AbstractCegarLoop]: Abstraction has 2641 states and 2846 transitions. [2021-12-18 20:06:26,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 5.701863354037267) internal successors, (918), 162 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 2846 transitions. [2021-12-18 20:06:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-18 20:06:26,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:26,171 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:26,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-18 20:06:26,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:26,383 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1865008954, now seen corresponding path program 5 times [2021-12-18 20:06:26,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:26,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293173119] [2021-12-18 20:06:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:26,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3525 backedges. 306 proven. 3145 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-18 20:06:27,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293173119] [2021-12-18 20:06:27,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293173119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283742521] [2021-12-18 20:06:27,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:06:27,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:27,384 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:27,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-18 20:06:28,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-18 20:06:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 209 conjunts are in the unsatisfiable core [2021-12-18 20:06:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:06:29,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:06:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:06:32,207 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:06:32,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:06:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3525 backedges. 306 proven. 3146 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-18 20:06:32,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:32,704 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4794 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4794) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 16)) 0)) is different from false [2021-12-18 20:06:32,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:32,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:06:32,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:32,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:06:32,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:06:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3525 backedges. 306 proven. 3145 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-18 20:06:33,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283742521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:33,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:33,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 89 [2021-12-18 20:06:33,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036191897] [2021-12-18 20:06:33,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:33,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 20:06:33,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 20:06:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=7425, Unknown=1, NotChecked=172, Total=7832 [2021-12-18 20:06:33,214 INFO L87 Difference]: Start difference. First operand 2641 states and 2846 transitions. Second operand has 89 states, 89 states have (on average 5.696629213483146) internal successors, (507), 89 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:35,346 INFO L93 Difference]: Finished difference Result 3920 states and 4229 transitions. [2021-12-18 20:06:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-18 20:06:35,346 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 5.696629213483146) internal successors, (507), 89 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2021-12-18 20:06:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:35,348 INFO L225 Difference]: With dead ends: 3920 [2021-12-18 20:06:35,348 INFO L226 Difference]: Without dead ends: 2588 [2021-12-18 20:06:35,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 575 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=441, Invalid=12444, Unknown=1, NotChecked=224, Total=13110 [2021-12-18 20:06:35,349 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 171 mSDsluCounter, 7601 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 7725 SdHoareTripleChecker+Invalid, 6806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3721 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:35,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 7725 Invalid, 6806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3021 Invalid, 0 Unknown, 3721 Unchecked, 1.0s Time] [2021-12-18 20:06:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-12-18 20:06:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2588. [2021-12-18 20:06:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2587 states have (on average 1.0773096250483185) internal successors, (2787), 2587 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 2787 transitions. [2021-12-18 20:06:35,364 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 2787 transitions. Word has length 310 [2021-12-18 20:06:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:35,364 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 2787 transitions. [2021-12-18 20:06:35,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 5.696629213483146) internal successors, (507), 89 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 2787 transitions. [2021-12-18 20:06:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-18 20:06:35,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:35,367 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:35,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:35,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:35,568 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2097056594, now seen corresponding path program 49 times [2021-12-18 20:06:35,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:35,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114220330] [2021-12-18 20:06:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:35,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 146 proven. 3529 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:37,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114220330] [2021-12-18 20:06:37,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114220330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446100820] [2021-12-18 20:06:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:06:37,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:37,913 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:37,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-18 20:06:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:38,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 275 conjunts are in the unsatisfiable core [2021-12-18 20:06:38,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:38,366 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:06:38,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:06:40,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:06:40,855 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:06:40,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:06:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-18 20:06:44,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:06:44,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 20:06:47,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:06:47,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:47,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:06:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 146 proven. 3529 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:47,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:49,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:49,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:06:49,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:49,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:06:49,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:06:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 146 proven. 3529 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:54,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446100820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:54,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:54,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 62, 62] total 163 [2021-12-18 20:06:54,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293725795] [2021-12-18 20:06:54,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:54,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-12-18 20:06:54,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-12-18 20:06:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=25995, Unknown=1, NotChecked=0, Total=26406 [2021-12-18 20:06:54,524 INFO L87 Difference]: Start difference. First operand 2588 states and 2787 transitions. Second operand has 163 states, 163 states have (on average 4.815950920245399) internal successors, (785), 163 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:06,434 INFO L93 Difference]: Finished difference Result 6339 states and 6831 transitions. [2021-12-18 20:07:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-12-18 20:07:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 4.815950920245399) internal successors, (785), 163 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 317 [2021-12-18 20:07:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:06,438 INFO L225 Difference]: With dead ends: 6339 [2021-12-18 20:07:06,438 INFO L226 Difference]: Without dead ends: 5937 [2021-12-18 20:07:06,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9596 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=1100, Invalid=67281, Unknown=1, NotChecked=0, Total=68382 [2021-12-18 20:07:06,441 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 470 mSDsluCounter, 20392 mSDsCounter, 0 mSdLazyCounter, 7484 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 20575 SdHoareTripleChecker+Invalid, 14106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 7484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6511 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:06,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 20575 Invalid, 14106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 7484 Invalid, 0 Unknown, 6511 Unchecked, 2.7s Time] [2021-12-18 20:07:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5937 states. [2021-12-18 20:07:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5937 to 2647. [2021-12-18 20:07:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2646 states have (on average 1.0770975056689343) internal successors, (2850), 2646 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 2850 transitions. [2021-12-18 20:07:06,479 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 2850 transitions. Word has length 317 [2021-12-18 20:07:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:06,479 INFO L470 AbstractCegarLoop]: Abstraction has 2647 states and 2850 transitions. [2021-12-18 20:07:06,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 4.815950920245399) internal successors, (785), 163 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 2850 transitions. [2021-12-18 20:07:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-18 20:07:06,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:06,482 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:06,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:06,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-12-18 20:07:06,687 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:07:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1009107535, now seen corresponding path program 50 times [2021-12-18 20:07:06,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:06,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202984267] [2021-12-18 20:07:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:06,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3777 backedges. 1152 proven. 2624 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:07,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:07,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202984267] [2021-12-18 20:07:07,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202984267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:07,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116596341] [2021-12-18 20:07:07,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:07:07,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:07,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:07,896 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:07,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-18 20:07:08,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:07:08,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 241 conjunts are in the unsatisfiable core [2021-12-18 20:07:08,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3777 backedges. 1225 proven. 2551 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:10,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:12,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 20:07:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3777 backedges. 1225 proven. 2551 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:12,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116596341] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:12,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:12,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 115 [2021-12-18 20:07:12,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250402633] [2021-12-18 20:07:12,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:12,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-18 20:07:12,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:12,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-18 20:07:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=11746, Unknown=0, NotChecked=0, Total=13340 [2021-12-18 20:07:12,300 INFO L87 Difference]: Start difference. First operand 2647 states and 2850 transitions. Second operand has 116 states, 115 states have (on average 5.591304347826087) internal successors, (643), 116 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:16,864 INFO L93 Difference]: Finished difference Result 8043 states and 8714 transitions. [2021-12-18 20:07:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-18 20:07:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 5.591304347826087) internal successors, (643), 116 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-18 20:07:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:16,870 INFO L225 Difference]: With dead ends: 8043 [2021-12-18 20:07:16,870 INFO L226 Difference]: Without dead ends: 8043 [2021-12-18 20:07:16,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 579 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6628 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5873, Invalid=24229, Unknown=0, NotChecked=0, Total=30102 [2021-12-18 20:07:16,871 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1130 mSDsluCounter, 8040 mSDsCounter, 0 mSdLazyCounter, 6831 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 8296 SdHoareTripleChecker+Invalid, 6919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 6831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:16,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 8296 Invalid, 6919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 6831 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-18 20:07:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8043 states. [2021-12-18 20:07:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8043 to 2739. [2021-12-18 20:07:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 1.0777940102264427) internal successors, (2951), 2738 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 2951 transitions. [2021-12-18 20:07:16,904 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 2951 transitions. Word has length 321 [2021-12-18 20:07:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:16,904 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 2951 transitions. [2021-12-18 20:07:16,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 5.591304347826087) internal successors, (643), 116 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 2951 transitions. [2021-12-18 20:07:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-18 20:07:16,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:16,907 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:16,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:17,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:17,107 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:07:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:17,108 INFO L85 PathProgramCache]: Analyzing trace with hash -839514176, now seen corresponding path program 6 times [2021-12-18 20:07:17,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:17,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368853754] [2021-12-18 20:07:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:17,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3957 backedges. 325 proven. 3554 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-18 20:07:18,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:18,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368853754] [2021-12-18 20:07:18,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368853754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:18,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327426299] [2021-12-18 20:07:18,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:07:18,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:18,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:18,267 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:18,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-18 20:07:21,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-12-18 20:07:21,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 209 conjunts are in the unsatisfiable core [2021-12-18 20:07:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:21,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:07:22,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:07:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:07:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:07:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3957 backedges. 325 proven. 3554 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-18 20:07:23,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:23,785 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5149 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5149) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 17)) 0)) is different from false [2021-12-18 20:07:23,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:23,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:07:23,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:23,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:07:23,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:07:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3957 backedges. 325 proven. 3554 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-18 20:07:24,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327426299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:24,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:24,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 76 [2021-12-18 20:07:24,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403530872] [2021-12-18 20:07:24,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:24,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-18 20:07:24,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:24,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-18 20:07:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5356, Unknown=1, NotChecked=146, Total=5700 [2021-12-18 20:07:24,296 INFO L87 Difference]: Start difference. First operand 2739 states and 2951 transitions. Second operand has 76 states, 76 states have (on average 4.802631578947368) internal successors, (365), 76 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:28,226 INFO L93 Difference]: Finished difference Result 4100 states and 4423 transitions. [2021-12-18 20:07:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-18 20:07:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.802631578947368) internal successors, (365), 76 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-12-18 20:07:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:28,228 INFO L225 Difference]: With dead ends: 4100 [2021-12-18 20:07:28,228 INFO L226 Difference]: Without dead ends: 2686 [2021-12-18 20:07:28,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 621 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=732, Invalid=13313, Unknown=1, NotChecked=234, Total=14280 [2021-12-18 20:07:28,229 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1072 mSDsluCounter, 7040 mSDsCounter, 0 mSdLazyCounter, 5786 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 7189 SdHoareTripleChecker+Invalid, 6277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 5786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:28,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 7189 Invalid, 6277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 5786 Invalid, 0 Unknown, 337 Unchecked, 1.9s Time] [2021-12-18 20:07:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-18 20:07:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2686. [2021-12-18 20:07:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 1.077094972067039) internal successors, (2892), 2685 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 2892 transitions. [2021-12-18 20:07:28,245 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 2892 transitions. Word has length 327 [2021-12-18 20:07:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:28,245 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 2892 transitions. [2021-12-18 20:07:28,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.802631578947368) internal successors, (365), 76 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 2892 transitions. [2021-12-18 20:07:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-18 20:07:28,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:28,247 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:28,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:28,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:28,448 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:07:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -347294469, now seen corresponding path program 51 times [2021-12-18 20:07:28,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533903646] [2021-12-18 20:07:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:28,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 152 proven. 3826 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:30,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533903646] [2021-12-18 20:07:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533903646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915009962] [2021-12-18 20:07:30,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:07:30,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:30,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:30,313 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:30,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-18 20:07:34,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-18 20:07:34,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:34,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 311 conjunts are in the unsatisfiable core [2021-12-18 20:07:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:34,369 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:07:34,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:07:38,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:07:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:07:38,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 20:07:45,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:07:45,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:07:45,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-12-18 20:07:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 152 proven. 3826 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:45,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:50,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-12-18 20:07:57,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:07:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3978 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915009962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:57,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:57,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 63, 63] total 185 [2021-12-18 20:07:57,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901545826] [2021-12-18 20:07:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:57,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-12-18 20:07:57,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-12-18 20:07:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2544, Invalid=31496, Unknown=0, NotChecked=0, Total=34040 [2021-12-18 20:07:57,177 INFO L87 Difference]: Start difference. First operand 2686 states and 2892 transitions. Second operand has 185 states, 185 states have (on average 5.264864864864865) internal successors, (974), 185 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:35,712 INFO L93 Difference]: Finished difference Result 9467 states and 10229 transitions. [2021-12-18 20:08:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 346 states. [2021-12-18 20:08:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 5.264864864864865) internal successors, (974), 185 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 329 [2021-12-18 20:08:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:35,718 INFO L225 Difference]: With dead ends: 9467 [2021-12-18 20:08:35,718 INFO L226 Difference]: Without dead ends: 6977 [2021-12-18 20:08:35,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 493 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74415 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=11088, Invalid=233442, Unknown=0, NotChecked=0, Total=244530 [2021-12-18 20:08:35,728 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 6847 mSDsluCounter, 45928 mSDsCounter, 0 mSdLazyCounter, 24285 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6847 SdHoareTripleChecker+Valid, 46450 SdHoareTripleChecker+Invalid, 25863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 24285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 648 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:35,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6847 Valid, 46450 Invalid, 25863 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [930 Valid, 24285 Invalid, 0 Unknown, 648 Unchecked, 9.9s Time] [2021-12-18 20:08:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6977 states. [2021-12-18 20:08:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6977 to 6720. [2021-12-18 20:08:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6720 states, 6719 states have (on average 1.0834945676439947) internal successors, (7280), 6719 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6720 states to 6720 states and 7280 transitions. [2021-12-18 20:08:35,806 INFO L78 Accepts]: Start accepts. Automaton has 6720 states and 7280 transitions. Word has length 329 [2021-12-18 20:08:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:35,807 INFO L470 AbstractCegarLoop]: Abstraction has 6720 states and 7280 transitions. [2021-12-18 20:08:35,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 5.264864864864865) internal successors, (974), 185 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6720 states and 7280 transitions. [2021-12-18 20:08:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-18 20:08:35,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:35,811 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:35,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-18 20:08:36,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-12-18 20:08:36,012 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:08:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash -813339704, now seen corresponding path program 52 times [2021-12-18 20:08:36,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517315077] [2021-12-18 20:08:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:36,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 158 proven. 4135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:38,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517315077] [2021-12-18 20:08:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517315077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022304992] [2021-12-18 20:08:38,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:08:38,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:38,699 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:38,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-18 20:08:39,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:08:39,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 297 conjunts are in the unsatisfiable core [2021-12-18 20:08:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:39,213 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:39,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:08:42,386 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:08:42,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-12-18 20:08:42,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:08:42,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:08:47,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:08:47,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:47,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:08:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 158 proven. 4135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:47,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:48,478 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5417 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5417) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 26)) 0)) is different from false [2021-12-18 20:08:48,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:48,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:08:48,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:48,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:08:48,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:08:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 158 proven. 4135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:53,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022304992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:53,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:53,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 65, 65] total 165 [2021-12-18 20:08:53,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055064443] [2021-12-18 20:08:53,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:53,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2021-12-18 20:08:53,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-12-18 20:08:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=26262, Unknown=1, NotChecked=324, Total=27060 [2021-12-18 20:08:53,113 INFO L87 Difference]: Start difference. First operand 6720 states and 7280 transitions. Second operand has 165 states, 165 states have (on average 4.842424242424243) internal successors, (799), 165 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:11,678 INFO L93 Difference]: Finished difference Result 7575 states and 8200 transitions. [2021-12-18 20:09:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-12-18 20:09:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 4.842424242424243) internal successors, (799), 165 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 341 [2021-12-18 20:09:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:11,685 INFO L225 Difference]: With dead ends: 7575 [2021-12-18 20:09:11,685 INFO L226 Difference]: Without dead ends: 7352 [2021-12-18 20:09:11,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 587 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14466 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=1736, Invalid=81499, Unknown=1, NotChecked=574, Total=83810 [2021-12-18 20:09:11,688 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 1991 mSDsluCounter, 23913 mSDsCounter, 0 mSdLazyCounter, 12394 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 24113 SdHoareTripleChecker+Invalid, 17294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 12394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4638 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:11,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 24113 Invalid, 17294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 12394 Invalid, 0 Unknown, 4638 Unchecked, 4.7s Time] [2021-12-18 20:09:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2021-12-18 20:09:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 6779. [2021-12-18 20:09:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6778 states have (on average 1.0833579226910592) internal successors, (7343), 6778 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 7343 transitions. [2021-12-18 20:09:11,771 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 7343 transitions. Word has length 341 [2021-12-18 20:09:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:11,771 INFO L470 AbstractCegarLoop]: Abstraction has 6779 states and 7343 transitions. [2021-12-18 20:09:11,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 4.842424242424243) internal successors, (799), 165 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 7343 transitions. [2021-12-18 20:09:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-12-18 20:09:11,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:11,775 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:11,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:11,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-18 20:09:11,976 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:09:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2124145717, now seen corresponding path program 53 times [2021-12-18 20:09:11,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:11,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320256307] [2021-12-18 20:09:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:11,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1352 proven. 3050 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:13,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320256307] [2021-12-18 20:09:13,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320256307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632849071] [2021-12-18 20:09:13,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:09:13,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:13,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:13,337 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:13,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-18 20:09:14,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-12-18 20:09:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 262 conjunts are in the unsatisfiable core [2021-12-18 20:09:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1458 proven. 2944 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:17,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:19,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-18 20:09:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1458 proven. 2944 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:21,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632849071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:21,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:21,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 148 [2021-12-18 20:09:21,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236346610] [2021-12-18 20:09:21,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:21,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-18 20:09:21,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-18 20:09:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3088, Invalid=18964, Unknown=0, NotChecked=0, Total=22052 [2021-12-18 20:09:21,326 INFO L87 Difference]: Start difference. First operand 6779 states and 7343 transitions. Second operand has 149 states, 148 states have (on average 5.47972972972973) internal successors, (811), 149 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:26,039 INFO L93 Difference]: Finished difference Result 9469 states and 10275 transitions. [2021-12-18 20:09:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-18 20:09:26,040 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 148 states have (on average 5.47972972972973) internal successors, (811), 149 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2021-12-18 20:09:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:26,047 INFO L225 Difference]: With dead ends: 9469 [2021-12-18 20:09:26,047 INFO L226 Difference]: Without dead ends: 9469 [2021-12-18 20:09:26,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10640 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9505, Invalid=34385, Unknown=0, NotChecked=0, Total=43890 [2021-12-18 20:09:26,049 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 1145 mSDsluCounter, 8432 mSDsCounter, 0 mSdLazyCounter, 7013 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 8703 SdHoareTripleChecker+Invalid, 7076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 7013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:26,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 8703 Invalid, 7076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 7013 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-18 20:09:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9469 states. [2021-12-18 20:09:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9469 to 6871. [2021-12-18 20:09:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6871 states, 6870 states have (on average 1.083551673944687) internal successors, (7444), 6870 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6871 states to 6871 states and 7444 transitions. [2021-12-18 20:09:26,110 INFO L78 Accepts]: Start accepts. Automaton has 6871 states and 7444 transitions. Word has length 345 [2021-12-18 20:09:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:26,110 INFO L470 AbstractCegarLoop]: Abstraction has 6871 states and 7444 transitions. [2021-12-18 20:09:26,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 148 states have (on average 5.47972972972973) internal successors, (811), 149 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6871 states and 7444 transitions. [2021-12-18 20:09:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-18 20:09:26,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:26,115 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:26,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:26,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:26,316 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:09:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1997265173, now seen corresponding path program 54 times [2021-12-18 20:09:26,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:26,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196631595] [2021-12-18 20:09:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:26,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4621 backedges. 164 proven. 4456 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:29,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196631595] [2021-12-18 20:09:29,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196631595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:29,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973886399] [2021-12-18 20:09:29,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:09:29,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:29,196 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:29,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-18 20:09:42,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-12-18 20:09:42,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 313 conjunts are in the unsatisfiable core [2021-12-18 20:09:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:42,306 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:09:42,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:09:42,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:09:45,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:09:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:09:46,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 Killed by 15